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