"Where or When" is a show tune from the 1937 Rodgers and Hart musical Babes In Arms. It was first performed by Ray Heatherton and Mitzi Green. That same year, Hal Kemp recorded a popular version. It also appeared in the movie of the same title two years later. Dion and the Belmonts also released a successful remake of the song, which reached number 3 on the Billboard Hot 100 in January 1960. In 1963, The Lettermen released their version as a single, which peaked at number 98 on the Hot 100. The song was used for the 1992 biopic Sinatra, starring Philip Casnoff; Frank Sinatra performs the song on stage at the Paramount Theatre.