“Sing a Song” was written by White and EWF guitarist Al McKay. It was a studio track from Earth, Wind & Fire’s triple-platinum double-live album Gratitude, which was released on November 11, 1975. The song spent two weeks atop Billboard's R&B singles chart and peaked at #5 on Billboard’s Hot 100 pop chart. The gorgeous ballad “Can’t Hide Love,” another studio cut from the album, had an impressive showing on the Billboard’s R&B singles chart, peaking at #11.
Gratitude was released on Columbia Records, and it was produced by Maurice White, Charles Stepney and Joe Wissert (live shows). The full band lineup for the album was Verdine White (bass, vocals, percussion), Larry Dunn (piano, organ, Moog synthesizer), Fred White (drums, percussion), Johnny Graham (guitar), Andrew Woolfolk (saxophone, percussion), Philip Bailey (vocals, congas, percussion), Maurice White (vocals, kalimba, drums, timbales, producer), Don Myrick (saxophone), Al McKay (guitar, percussion), Louis Satterfield (trombone), Ralph Johnson (drums, percussion) and Michael Harris (trumpet).
“Sing a Song” was included on the following film soundtracks: Something’s Gotta Give, Think Like a Man, Radio Arrow, The Color of Friendship and the video game For All Mankind Time Capsule. Also, it was sampled on the song “Hey Goldmember,” which BeyoncĂ© sang in the 2002 spy action comedy Austin Powers in Goldmember.