The track is famously sparse, consisting of programmed drums, one bass line, one keyboard part, and both live and programmed handclaps.
American Bodies in Pharrell Williams's “24 Hours of Happy” Pharrell Williams - Happy (From Despicable Me 2) (G.I.R.L)
Pharrell wrote nine other songs for the film's "happy montage" before "Happy" was finally accepted on the tenth attempt. The track is famously sparse, consisting of programmed