FM is the third Korean mini album of South Korean girl group Crayon Pop. It was released on March 27, 2015, one year after their last Korean release, "Uh-ee". The lead single of the same name was written by hitmaker Shinsadong Tiger and has a "female warrior" concept based on super hero TV shows such as Super Sentai and Sailor Moon.

The lead single, "FM", was first performed at K-Pop Night Out at SXSW in Austin, Texas on March 19. After returning to Seoul, Crayon Pop had a street showcase in Dongdaemun District on March 21, followed by guerrilla performances in Myeong-dong, COEX and Hongdae. Promotion for the album began on March 26 on the music show M! Countdown.

The album was released on March 27 and has three songs. "FM", written by Shinsadong Tiger and Monster Factory, was described as a "catchy song with mysterious lyrics and rhythmical melody". "FM" stands for "field manual" and is slang for someone who is a rule follower, but not in a good way. In an interview with MTV, Ellin discussed the concept of "FM": "Unlike the cute image from 'Bar Bar Bar', we are portraying the image of a charismatic female warrior; we are mature women."

"Hapataka" is written by Kim Yoo-min (who also wrote "Bar Bar Bar") and is a "mix of dance and punk sounds along with lyrics that flip the Korean alphabets backwards". "1, 2, 3, 4" is written by Song Ji-hoon of Dumb & Dumber, the producer team behind Crayon Pop's first three singles. "1, 2, 3, 4" had previously been recorded and performed in both Japanese and English, and a Korean version was recorded for the album.

The music video for "FM" was filmed in a quarry in Hwaseong, Gyeonggi-do and has a "female warrior" concept inspired by Super Sentai and Sailor Moon. The music video is similar to a 1990s super hero TV show, with Crayon Pop transforming into super heroes and defeating a rat-like monster villain. BornUs of K-Much appears in the music video as Tuxedo Mask, Sailor Moon's love interest.

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