Hoot (Hangul: 훗; subtitled 009) is the third mini-album by a South Korean girl group, Girls' Generation. The mini-album consisted of five songs, and was released on October 27, 2010 by S.M. Entertainment.

The album is listed, by Gaon Album Chart as the third best-selling album of 2010 in South Korea, with 163,066 copies sold.

Contributions to the album's production came from a wide range of producers such as Wheesung, Jinu (Hitchhiker), Kenzie, and former Roommate and Nadia member Hwang Hyun. The title song, "Hoot", was composed by Danish songwriter-producers Martin Michael Larsson and Lars Halvor Jensen, of Deekay, together with British songwriter Alex James, with the intention of creating an "exciting up-tempo record for a female artist or group". It was originally titled "Bulletproof" and written with English lyrics.

"Mistake" is the second track and a R&B ballad with lyrics by Kwon Yuri which is about a girl who can't move on from a relationship with a guy who asked her to "wait" for him but in the end he found another and she blames herself for not trying harder to keep the love between them. The third track "My Best Friend" is a contemporary R&B song with lyrics by Wheesung that talks about each other's friendship of Girls' Generation. The fourth track "Wake Up" is an electropop song carrying dark synth beat-sounds with medium tempo shuffle rhythm. "Snowy Wish" is the fifth track and a bright dance-pop song.

Hoot debuted at the #1 spot on October 30, 2010 on the Gaon Chart. The song won Triple Crown on Inkigayo on November 28, 2010 and won 5 times on Music Bank of KBS. The song demo was written and recorded in the UK, with Nina Woodford singing the vocal, and then finished and mixed in Denmark.

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