f(x) in 2010. (L-R) Victoria, Amber, Krystal, Sulli, Luna
f(x) is a South Korean Girl Group formed in 2009 by SM Entertainment. The name is a play on the mathematical notation for function, with "f" signifying "flower" and "x" representing the female's double X chromosome. The group members have also been nicknamed "function girls".The quartet consists of Victoria, Amber, Luna, and youngest Krystal, who is coincidentally the younger sister of Girls' Generation's Jessica. Member Sulli is currently on hiatus.The group debuted on September 5, 2009 with the release of the single LA ch TA. The lead single off their album Pinocchio gained their first music program win and was their first song to win the triple crown.As of 2013, f(x) is the first South Korean group to perform at SXSW and they recently did a video with Anna Kendrick (Camp, Twilight, Pitch Perfect) for Funny Or Die.com, both events of which has more or less garnered attention to f(x) in the US.Korean Discography:
Bifauxnen - Amber, the one with the most fangirls.
Big Eater - Krystal, as shown on her reality show with her sister.
But Not Too Foreign - Krystal and her sister Jessica was born and raised in America, therefore making her Korean-American. Same for Amber, who was born and raised in America to Taiwanese parents, making her Taiwanese-american.
Cooking Duel - There was one in the 12th episode of Koala, in which Luna and Sulli (who made a rice cake soup) teams up to go against the team of Victoria and Krystal (who made kimchi pancakes). The duel was peaceful, though.
Cosmetic Award - The reward in their last mission in Koala? A piece of cardboard with the words "End of broadcast. You have done well".
The Cutie - Sulli is f(x)'s resident fake maknae (Krystal is younger, although she and Sulli are considered the same age in Korea). Some people insist that she, Sulli, is the actual maknae, mostly because she looks (and acts) younger than Krystal.
Denied Food as Punishment - The consequence in the 7th episode of Koala, in which the first person to find the Egg Pie shop gets to buy... well, an egg pie. (In the other episodes, they sometimes compete against each other to get the prize money which would be used to buy food).
But... watch f(x)'s shows and you'll find out that she and her members are actually very nice and energetic.
More like Kuudere type two— Krystal and her sister Jessica have said that hearing people call them "ice princesses" makes them really sad and even stated that the reason behind their reality show Jessica & Krystal was to dispel that idea and to show that they're really shy and quite playful.
Older Than She Looks - Krystal. She was only 14 years old in the LA chA TA music video, which was released in September 2009.
Younger Than She Looks - Sulli, on the other hand, has quite the babyface. Even though she's actually about 7 months older than Krystal.
Surprisingly Good English - Krystal, who was born in California. They moved to Seoul in 2000 after her sister Jessica was scouted by SM. (Krystal was too young to be scouted at that time. She was scouted in 2006)
Amber counts too, because she also grew up in America.
Surprisingly Good Chinese - People who aren't avid fans might think that all the members of f(x) are Korean. That's not true - Victoria grew up in Beijing, and Amber's parents are Taiwanese. Victoria is fluent in Mandarin Chinese, Amber, on the other hand, has conversational fluency in said language.
Amber is a Cantonese speaker as well.
Surreal Music Video - Not an official music video, but the teaser / "art video" for Pink Tape. Try to decipher what the heck's happening in the video.
As well as the teaser and music video for Red Light.
Take That - To the too-high standards of the South Korean celebrity industry. Blink and you'll miss it, but here it is, from the ending credits of Koala episode 11.
Sulli: South Korea is so picky about being skinny, that's why you can't develop/grow anymore!
Luna: We need to have some fat!
Sulli: Don't you agree? Everyone's so skinny!
Victoria: We should stop here... (laughs) Please edit this out!
Team Mom - Victoria, who cooks and does the grocery shopping for the members. She's endearingly called "Vic Umma" (mother).
During her time in the show We Got Married, the other members treated her partner Nichkhun (of 2PM) as their dad.
Teen Idols - Even though Victoria, Amber, Luna and Sulli are already in their 20s (in Korean age, that is).
In Hello f(x), they went to Africa for a photoshoot, to Thailand to perform in the Pattaya Music Festival, and to Japan (along with label-mates SHINee) for the ''Boys Over Flowers'' promotion.
And then there's Koala, in which they went to 5 countries to promote Korea's culture - although it sometimes looked more like a cooking (and eating) show than a travelogue show...
Their newest show Amazing f(x) is this as well.
Unperson - When f(x) was filming Koala, Amber was recovering from her ankle injury. Because she wasn't part of the show, video footages of the members talking about Amber were edited out.
It went as far as asking a Hong Kong fanboy that they were filming to take down his poster of Amber.
In fact, she was gone for more than 6 months, and SM insists that it's because she was recovering from her ankle injury (it's true, though). And since they've used that same excuse for 6 months, fans have speculated that Amber had a dispute of sorts with SM (there were allegations she fought with another member and debated leaving, but this was never proven).
Not to mention that she wasn't included in the 2011 f(x) calendar. People thought that f(x) would have their comeback with only four members, but fortunately that wasn't the case.
Who Wears Short Shorts?: Victoria, Krystal and Luna mostly alternate on who wears them (it's most common Krystal and Luna, when Victoria wears hotpants, the other two get the tight pants). Sulli often sticks with skirts and Amber only wears pants and long shorts.