"Summertime" is a song by R&B singer Beyoncé Knowles featuring rapper P. Diddy and Ghostface Killah on the remix version, released as the second and final single to promote the film The Fighting Temptations in 2003, in which Knowles plays the leading lady. The song is not featured in the film but is part of the official soundtrack. It first appeared as a B-side to Knowles' 2003 smash hit "Crazy in Love".