"Grease" is a song written by Barry Gibb and performed by Frankie Valli. "Grease" is the title song for the 1978 musical motion picture Grease, which was based on the stage play of the same name. It was featured twice on the film's soundtrack, as the first track and reprised as the final track.

Barry Gibb wrote a title song to order for the Robert Stigwood film of the stage musical Grease. The song was recorded shortly after filming of the 1978 musical film Sgt. Pepper's Lonely Hearts Club Band, which was when Gibb invited Peter Frampton to the session. Frampton plays guitar on the recording, while Gibb himself provides backing vocals. The other musicians were some of those from the Andy Gibb album that was being made around the same time.

Valli is known for his powerful falsetto voice, but on this track he does not sing in his upper range. The film's director Randal Kleiser did not like "Grease" and the new song "You're The One That I Want" because they did not fit the 1950s style musically or lyrically. It became a No. 1 single in the United States in 1978 (it would turn out to be Valli's final No. 1 single), and also reached No. 40 on the R&B charts in the same year.

The Bee Gees later performed the song in their tour One Night Only in 1997 until 1999, and captured on their live offering One Night Only.

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