Using a chord progression written by Earth, Wind & Fire guitarist
Al McKay, vocalist
Maurice White and songwriter
Allee Willis wrote the song over one month. Willis was initially bothered by the gibberish "ba-dee-ya" lyric White used through the song, and begged him to rewrite it: "I just said, 'What the fuck does 'ba-dee-ya' mean?' And he essentially said, 'Who the fuck cares?' I learned my greatest lesson ever in songwriting from him, which was never let the lyric get in the way of the groove."