Before the Season 5 'inversion' of the trope Nickelodeon aired this show multiple times a day, gave it and star Miranda Cosgrove extremely good treatment, more than any other Nickelodeon show that isn't Spongebob. Along with the many merchandise and magazine attention the show gets it was Nick's flagship show. The show was given an open cheque for renewal as long as the main trio wanted to continue doing it. They even got a fifth season, which is very rare for Nick or Disney shows.
The inversion happened after that 5th season. The Sam/Freddie story arc tanked badly, and Nick decided to push Victorious as the best show on the network, dumping Miranda Cosgrove as the network star in favor of Victoria Justice and ceasing to promote episodes well, with some not getting any promotion at all.
Every time the show is removed from the Italian feed's schedule, it always finds a way back in. Also, it and Avatar: The Last Airbender are the only old shows that still get promoted on the Italian Nickelodeon Youtube channel.
The Cast Showoff: Carly (Miranda) shows off her singing ability for a few lines of Amazing Freaking Grace in "iPie", and performs an entire song in Season 4's "iDo". She also showcases her singing talent in the Victorious crossover, which aired in June 2011.
Interestingly, this is the first time she actually sings onscreen even if her more famous role on the show is taken into account.
Creator Backlash: Jennette McCurdy does not have fond memories of her experience on the show. In an interview, she said that she resented her past acting career in general due to suffering from depression, eating disorders, insecurities and embarrassment over her kiddie roles. She hated playing Sam, as she felt that the character was a bad role model for children and found it difficult to portray a character so different from her real self. It was never her intention to pursue a full-time acting career, but her parents made her become a child actress to financially support the family. Shortly after her mom died, Jennette cut ties with Nickelodeon due to salary disputes and would retire from on-camera acting in 2017, refusing to return for the show's revival on Paramount+. Despite her opinions of the show and her character, she has said that in a recent podcast with Anna Faris that she remains good friends with her fellow castmates.
Griffin, Carly's temporary ex-boyfriend as seen in "iDate A Bad Boy", was played by Drew Roy, who was 23 and looked like it. And when he guest-starred in the 2021 revival, he was 35 and definitely looked it. The original episode featured him kissing the star of the show Miranda Cosgrove, who was 15 when they filmed it in the fall of 2008. Miranda apparently got to choose which guy they cast.
Nora Dershlit looks more like she's in her twenties than her teens, but Danielle Morrow's age is more or less unknown, as most online sources don't list her date of birth. This site claims Danielle was born on August 15, 1993, which, if true, would mean that she'd have been 16 in "iPsycho" and 18 in "iStill Psycho", making her roughly the same age as Nora and a case of Younger Than They Look.
Played somewhat straight in the latter seasons. In the original series finale "iGoodbye", Jennette McCurdy was 20, Miranda Cosgrove and Nathan Kress were both 19 at the time of filming "iGoodbye" in June 2012.
Also downplayed with Spencer. Spencer was 26 in the first season while Jerry Trainor himself was 30.
Some people who hate the Sam/Freddie pairing have called the the second half of Season 5 due to the story arc taking up 4 out of the 9 episodes filmed, since Sam with Freddie together continually taking the A-Plot with Carly pushed down to the B-plot or C-plot in pretty much every episode, especially as some episodes had Carly in a plot completely away from the rest of the main cast. Many consider it a Spinoff or Continuity Reboot instead of a new season with characters who look, sound and share the same names, but aren't the same characters from previous seasons.
Ironically, Sam was eventually given a spin-off show called Sam & Cat.
The imaginative, pejorative names of "Sucky" and "Cruddie" for Seddie and Creddie respectively.
Flip-Flop of God: Nathan Kress bluntly stated in an online 2017 interview that he doesn't support either romantic pairing (Creddie or Seddie), since Sam was an abusive girlfriend while Carly, although cordial and like-minded, only reciprocated his affections for her when he shoved her out of harm's way of an oncoming food truck. In a 2021 interview regarding the Paramount+ revival, however, Nathan referred to Creddie favorably (his only issue was that Carly had to reciprocate his one-sided love for her in a way that that didn't involve him rescuing her), claiming that the idea of Carly and Freddie getting back together in the revival and getting hitched in canon was in the cards.
Friday Night Death Slot: Despite most of the second half of Season 3 airing on Fridays (mostly while they still had more episodes to air and when Big Time Rush needed more publicity), it managed to avert this and still did pretty well in its slot most of the time, getting solid audiences there often. The "iSpace Out" special had over 5 million viewers even in the presence of a new episode of The Suite Life on Deck airing at the same time. And when "iGot a Hot Room" aired in the summer, it aired against another new episode of the same show and absolutely obliterated its ratings. However, "iStart a Fan War" didn't exactly stand out as well as one would have expected, scoring only 5.02 million viewers. Guess what screwed it over?
Harpo Does Something Funny: Most of the dialogue was retroscripted, with Dan Schneider sometimes feeding the actors new lines right before they did a take.
One week before the episode "iSaved Your Life" aired, a promo debuted showing Carly and Freddie kissing. Dan Schneider, in an effort to calm the fans down, implied it might not be what it appeared. Cue the actual episode, where they ended up kissing at least 8 times, and it was as it appeared.
He posted a picture of Carly and Freddie kissing as a tease for "iSpeed Date" then cut the kiss out later because of a kiss would have impacted on the story of "iSaved Your Life". The kiss was likely to have been removed from the script before filming because they would have done the 2nd script already, so he basically created a blatant piece of lying Ship Tease for no reason.
Make-Out Kids: The episode "iSaved Your Life" in Season 3 (filmed in the Spring of 2009) featured several heavy make out kissing scenes between Miranda Cosgrove and Nathan Kress. According to an interview article in Tiger Beat, Miranda Cosgrove and Nathan Kress were completely unaware that they would be kissing each other on-screen until they read the script, just before filming began. They were shocked. In the interview Miranda stated, "Since we're friends, it's not uncomfortable!"
Not Screened for Critics: Like every teen and children's show, iCarly is not shown to critics. In combination with closed set filming and tight control on information being passed around, Dan managed to keep the Sam/Freddie plot in "iOMG" and every episode in the subsequent story arc a secret.
The Other Darrin: When Gibby's mother first appeared in "iGo Nuclear", she was portrayed by Laura Benz-Phillips; in all later appearances, she was replaced with Deena Dill.
Playing Their Own Twin: In the episode "iTwins", Jennette McCurdy plays the roles of both Sam and Melanie Puckett, identical twins who are polar opposites. This is actually lampshaded throughout when Freddie is convinced Melanie is just Sam in disguise.
In-universe example: Gibby is a huge fan of the British boy band One Direction and got to sing with them as a ploy to get their lead singer to stop pretending to be sick so he could keep staying at Carly's and be nursed by her.
Real-Life Relative: Gibby (Noah Munck)'s brother Guppy is played by his real-life brother Ethan.
The sidewalk where Josh ran around in "Dinner With Bobo" is the same sidewalk Carly rode her electric-powered scooter in "iGo Nuclear".
The pathway in "The Wedding" where Drake and Josh got stranded in their car is also the spot "Somewhere Outside Tokyo" where Carly, Sam, and Freddie were ditched by Kyoko and Yuki in iGo To Japan.
Any big room needed ends up being a redress of the main iCarly studio set. Examples include Freddie's room from "iSaved Your Life". And Carly's bedroom in "iGot A Hot Room".
The school hallway/locker area is a redress of the school set from That's So Raven, with the main difference being the addition of a central wide door entrance, and iCarly not using an extra part of the hallway on the right side of the entrance. The entire set itself began its life as the school hallway set on Saved by the Bell.
If you paint the lockers, it becomes the set for Victorious.
Running the Asylum: "iOMG" and "iLost My Mind" Sam/Freddie romance arc episodes utterly match several of the biggest Fandom-Specific Plot lines and the most common fanfic tropes. Sam and Freddie end up Locked in a Room together at the school. Sam giving Freddie a Forceful Kiss to clear up that Sam actually likes him. Carly becoming a Shipper on Deck and Freddie returning Sam's feelings without any explanation or closure for his feelings for Carly.
Schedule Slip: As described in Screwed By The Network right below.
Screwed by the Network: After season three, Nick took a decidedly inconsistent approach to the show. The poor scheduling is one the biggest reasons for the abysmal ratings for Season 5 compared to seasons 2, 3 and 4.
For Seasons 4 and 5, Nick only ordered 13 episodes at at time compared to the 26 or so that they were doing in the first three. Said episodes aired on random dates. When new episodes of the show were announced to air each week, that suddenly stopped after four episodes.
Other new episodes aired with little to no advertising and on awkward dates, such as December 28 for the second blooper episode, and December 31 for the "iPsycho" sequel. Admittedly, Dan Schneider had to take some of the blame, as he seemed to have poor time management; this meant Nick was only ordering 13 episodes of both iCarly and Victorious when they could have fit full seasons in, even with the studio split taken into account.
Scully Box: Freddie/Nathan had to use the shoe version in Season 1 due to not having gone through puberty yet. He has massive platform shoes. By Season 2 this was unnecessary and he was about the same height as Carly/Miranda, by Season 3 he's grown even more, so much that during "iSpeed Date" Carly/Miranda can place her head in the crook of his neck and it fits perfectly.
Jennette/Sam starts wearing platform shoes during Season 4 for the same reason that Freddie/Nathan did in Season 1.
Shoe Slap: Purposely averted. If you watch "iGo to Japan", you'll notice Miranda and Jeanette are barefoot for the entirety of the first scene. They were in swing sets temporary mounted on the ceiling and constantly swinging toward the camera. To avoid any mishaps with the camera and loose sneakers launching into them, they slipped off their shoes, sat them down mostly out of view on set, and shot the scene with bare feet. Jeanette can be seen scooping up her sneakers as she pads down the hallway after high-fiving Miranda.
Shrug of God: Just ask Dan Schneider a question about Seddie or Creddie. It will be a miracle if you get a straight answer back. The more 'intelligent' the question, the less likely he will even respond at all. The dumbest, or least focused questions might get the question thrown back at them in a different way.
Suppressed Mammaries: In between Season 1 and 2, Nathan Kress (Freddie) grew up... and Jennette McCurdy (Sam) grew outward. Since then, the show began tot take o wrapping Sam up in layers of 3 or 4 t-shirts, but she kept on growing. In a few episodes in season 3 they forgot about this, such as the rabbi scene in iSaved Your Life, and it's pretty obvious what they were doing. By season 4, Jennette continued growing, to the point that the multiple layers of t-shirts don't really hide her chest anymore, and they could just about get away with looser clothing, but even then... All pretense of covering her up was gone now, about 1/3 of the way through Season 4.
"Take That!" Tit-for-Tat: Disney Channel and Nickelodeon had a minor feud going during The Noughties, mainly playing out through stories and devices in iCarly and Sonny with a Chance. iCarly has an episode where it takes shots at the Disney Channel (a.k.a. "Dingo" Channel), for In-Universe stealing the ideas of iCarly.com. They also claim that the original ideas of the channel are bland and unentertaining, and they make all their adult characters stupid. Sonny With a Chance got to have its own go with So Random! going to hell with new producers in a storyline that is mocking Nick's All That. iCarly then counters again with an entire episode dedicated to completely unsubtly criticise a certain network's new interpretation of kids' TV and their programming overhaul that ditched all of the 'good' children's TV shows in favor of lesser and more demeaning ones.
Listen to how Gibby delivers his line: 'Uh-oh! Looks like trouble off the stern... port... bow.' You'll notice how he seems confused and slows down at the end of that line. The reason? Noah ("Gibby") forgot the line as he was saying it! He couldn't remember how it ended. Later, when I watched it in editing, I felt it played really funny, so I used the take where he forgot the line.
Why Fandom Can't Have Nice Things: Before Season 3 had started airing, Dan posted a script fragment from a future episode◊. He took it down quickly, but it was reposted on various sites. Naturally, shippers from both sides went nuts, especially on LiveJournal. After heavy criticism about Dan ruining the fandom and the LJ communities with his interaction he quit and deleted his LiveJournal, without warning or notice (meaning the fandom lost a lot of interesting interaction with him), and eventually setup his own blog site, which he claimed was for better control, but his first post was about being pissed off with reponses to his script.
Word of God: Dan Schneider. Very carefully avoids Lying Creator by using ambiguous meanings, hypothetical, counter-questions in response to questions and shrouding common shipping viewpoints in terms of what "his friends" might think about what's happening. Was very active in the fandom up to the start of Season 3, although not as much now that he's dealing with Victorious as well as the 4th season of iCarly.
Taken to the extreme with his post about the finale "iGoodbye". After seeing backlash about his failure to make the Seddie pairing canon while he made Creddie canon via a typical Last-Minute Hookup, he wrote a blog that could be described in short as "completely inverting the meaning of what just took place on screen" by attempting to claim the Last-Minute Hookup, the romantic moment Carly comes up to the studio, takes Freddie by the hand then kisses him just moments before leaving for Italy may have actually been a platonic 'friendship' kiss. This did not go down well in the fandom, with people calling him out for the Blatant Lies, many female viewers were especially upset about the idea that they just go around passionately kissing their male friends to show their friendship. This is a good example of Word of God actually making the understanding of what took place on their show less clear. Then again, it was likely deliberate as Dan has the new Spin-OffSam & Cat, and he wanted to dangle the potential of the Seddie relationship picking up on that show to get more viewers. Most people in the fandom have simply ignored him and have gone by what took place on screen.
What Could Have Been: The original name of the Carly character was going to be Sam. The female sidekick was going to be called Kira. But they couldn't get the iSam domain name. So Sam became Carly, and Kira became Sam. This has the curious effect of swapping around the Portmanteau Couple Name of both major ships. The Just Friends Creddie ship would have been known as Seddie, while the Jerkass Seddie ship would have been known as Kreddie. It would have a minor impact on the Les Yay Cam ship by changing the name from Cam (Carly/Sam) to Kam (Kira/Sam).
Dan Schneider originally explored a straight Drake & Josh spin-off as a Miranda Cosgrove vehicle, with Miranda naturally reprising her role as Megan Parker, but ultimately he felt dissatisfied with every idea centered around that concept he could think of. He then explored the idea of a fresh concept and character that was getting closer to iCarly, but centered around a girl who suddenly found herself getting her own variety TV show. He got as far as writing the script for the pilot - and then threw it in the trash, once again being dissatisfied. He then changed the "TV show" to "web show", and things finally started to click.
A second iCarly spin-off centered around Gibby (and titled as such) had a pilot filmed but was not picked up. As originally envisioned by Dan, it would have ran alongside Sam & Cat and Victorious.
In-universe example: If Spencer was born normal, Carly and Nevel would be girlfriend and boyfriend, much to Carly's horror.
Sam's sock full of butter that she uses as a weapon in "iTake on Dingo" was originally going to be a sock full of quarters, but the powers that be decided that'd be too violent, since if a viewer decided to try it, it could actually do some damage. Probably for the best, as a sock full of butter is funnier anyway.
Word of God: Dan Schneider reveals in a blog post that they shot two different versions of the ending to iOMG; one where Carly never witnesses Sam and Freddie kiss near the end, and one where she does witness it. The second version is what made the final cut.