"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.
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.
Part of the song was interpolated in "Joints & Jam", a 1998 single by The Black Eyed Peas as well as being heard in the song "Blue Angels" by Pras released in the same year. The song was covered by UK girl group Girls Aloud. It was also sampled by De La Soul on their 1991 song "A Roller Skating Jam Named Saturdays".
A single "The Word" by the group Dope Smugglaz was released in 1998. It was later remixed by PMT for the 2001 soundtrack to the motion picture Swordfish. Both versions contain samples repeating "is the word" throughout the song.