[4] Jim Jacobs and Warren Casey had written a different title track for Grease for its original Chicago production, but the song was discarded when the show was picked up on Broadway.

[5] Barry Gibb was commissioned to compose a new title song for Robert Stigwood's film of the stage musical.

Pepper's Lonely Hearts Club Band, Gibb invited castmate Peter Frampton to play guitar on the Grease session, while also providing backing vocals himself.

[10] Valli did not want to record a full album for RSO because he felt that Robert Stigwood had too much control over the Bee Gees' career and had too much of a conflict of interest in his numerous job titles.

Valli had been offered the part of the Teen Angel but chose to sing the theme song instead, stating that although that character's song ("Beauty School Dropout") did not chart as a hit, both Valli and Frankie Avalon profited mightily from their respective appearances through album royalties, and thus the choice worked out.

[8] The film's director, Randal Kleiser, did not like the added songs because they did not fit the late 1950s/early 1960s style either musically or lyrically, and Kleiser had planned on a different composition by Charles Fox and Paul Williams (Fox having written the theme from Happy Days) before being overruled by the producers.