- Chihaya's original song from the first game, Aoi Tori. It is a beautifully melancholic piece that practically defines Chihaya's feelings. It returns as an arrange for Episode 4's ending, complete with a new recording and a beautiful a cappella performance in the episode itself.
- Chihaya's Me ga Au Toki manages to be fast paced and emotional at the same time.
- arcadia. It just radiates awesome. Also was used as a theme song for the trailer of Mujin Gattai Kisaragi and starts playing when Haruka reveals herself as the Big Bad.
- Nemuri Hime - Sung by Chihaya a cappella at first, making the entrance of the orchestra all the more powerful in Ep 21. Another Awesome Moment because her passion for singing saves the day despite Kuroi's rigging of the background music, and it lets Jupiter realize what he's doing and leave for good.
- Yakusoku - Sung by 765PRO ALLSTARS - Ep 20 of the anime. It's also a Moment of Awesome, Heartwarming Moment, and a Tear Jerker (particularly in live performances).
- Saihyou - her Ex Episode song from One For All. It really lets her show the range and work of her voice. Extra awesome, because the full version includes part of "Aoi Tori" after the first section.
- ALRIGHT* - which Yukiho sings in episode 3 of the anime as a way of overcoming her own weakness. In performances with a live band, Azumin is joined by the guitarists during the bridge.
- Little Match Girl - Shows how Yukiho has become confident in herself, enough to take the lead in the center of the stage with no problems. The M@STER version is even more glorious.
- First Step is this and a huge heartwarming song coming straight from Azumin's heart to Yukiho's character.
- "Impervious Resolution", one of Yukiho's Million Live songs.
- Agent Yoru o Yuku has always been one of the most well-known songs in the series. However, the song really brings out the awesome in Episode 8, where it plays in the background while Makoto has an epic kung-fu fight with a grunt on top of a ladder bridge.
- Meisou Mind is incredibly cool.
- Tonari ni... is incredibly emotional, and the heartbreaking lyrics strongly imply that the singer is left behind by a person who passed away. The "movie" in the anime shows it as such, with Azusa whispering "I've decided to marry." at the hill mentioned in the song as she decides to move on. It's something you normally wouldn't expect from an idol series.
- "Mythmaker" has a very cool melody and Azusa using a deeper (and more seductive) singing voice than usual.
- L.O.B.M - Sung by 765PRO ALLSTARS - Ep 10. A Theme Music Power-Up.
- Watashitachi wa Zutto ...deshou? (previously known as Itsumademo Dokomademo) - Sung by 765PRO ALLSTARS - Ep 25. The Hard Work Montage just added the effect.
- Jibun Rest@rt - Sung by 765PRO ALLSTARS (without Iori, Ami and Asuza). It's a defining moment in the series, where the idols that aren't Ryuuguu Komachi step up and prove to the world that they're just as talented and that they can stand on their own.
- The last episode's performance of a mashup of the two openings, READY!!&CHANGE!!!!, in its fully animated glory. All the girls manage to hold this concert together even with their incredibly busy schedules.
- Overmaster is Project Fairy's badass rock Image Song (but strongly associated with Hibiki), which exemplifies the idea that All Girls Want Bad Boys. Made even better when sweet and shy Yukiho covers it.
- THE iDOLM@STER is a catchy and inspiring song that pretty much represents what iM@S stands for. Its incarnation in the second game is THE iDOLM@STER 2nd-mix, a techno remix which somehow makes it even better.
- Shiny Festa gives us edeN, quite possibly one of the most awesome rock songs in the series.
- DREAM is an incredibly cool song, enough that it got its own dance in One For All.
- It's time to party with Machiuke Prince!
- While all of the chapters tell one big love story, "Hatsukoi ~Issho Kataomoi no Sakura~" is a beautifully orchestrated start about the apparent unrequited love.
- "Fate of the World", the rocking song accompanying the Sleeping Be@uty trailer of the movie sung by 765's leader idols.
- ALIVE, the personal song of Dearly Stars idol Ai Hidaka, a massive genki girl trying to make it as an idol by her own merits, instead of just riding the coattails of her famous mother (as many producers have advised). Ai auditions and always gives her all, but gets rejected and fails more often than not; keeping up the cheerful persona to others, but secretly crying about it alone at a park at night. Knowing this, the song becomes that much more of a Tear Jerker and serves as an inspiring theme for perseverance in general.
- 961 Jupiter's Alice or Guilty is fairly awesome in itself, rivalling 961 Project Fairy's Overmaster in coolness. The 2014 Masters of Idol World medley has this song covered quite well by the seiyuu of Azusa, Hibiki, Rin, and (depending on the day) Julia or Nana.
- Kaede's image song, "Koi Kaze". Saori Hayami's singing voice is considered to be the best of the Cinderella Girls for good reason, and it's performed in CG episode 15 as she explains her reasons for refusing Mishiro's offer.
- "Acceleration", Leon's main image song. What else would you expect from Minori Chihara?
- "Blue Symphony", Chihaya's Million Live group song with Shiho, Megumi, and Kotoha.
- Julia's image song "Ryuuseigun" is the definition of rock, and Aimi Terakawa even plays lead guitar in live performances!
- "Trancing Pulse", sung by Triad Primus in the Cinderella Girls anime in episode 22, is universally considered to be one of the most OP songs in the entire franchise for its catchy tune and lyrics, and the awesome harmony between Rin, Nao, and Karen's cool voices.