"Billie Jean" blends post-disco, rhythm and blues, funk, and dance-pop. The song opens with a standard drum beat along with a standard hi-hat, and joined two bars later with a shaker. After two more bars, a repetitive bassline enters. Each time it passes through the tonic, the note is doubled by a distorted synth bass. This accompaniment is followed by a repetitive three-note synth, played staccato with a deep reverb. The defining chord progression is then established. Jackson's quiet vocals enter, accompanied by a finger-snap, which comes and goes during the verses, as the rhythm and chord progression repeats. Greg Phillinganes, who played keys, said of the song: "'Billie Jean' is hot on every level. It's hot rhythmically. It's hot sonically, because the instrumentation is so minimal, you can really hear everything. It's hot melodically ... lyrically vocally. It affects you physically, emotionally, even spiritually."