Keyboard player Steve Porcaro of Toto sings the demo for "Human Nature". After the demo was finished Quincy Jones heard it accidently on the flip side of a cassette. Quincy then had John Bettis rewrite the lyric. Steve played synth on "The Girl Is Mine" for Michael Jackson and Paul McCartney.

"The King Of Pop" Michael Jackson included "Human Nature" (Steve Porcaro - John Bettis) with the backing of Toto members in the groundbreaking 1982 chart topping release "Thriller". The album produced seven top ten hits! The single peaked at number two Adult Contemporary and number seven pop.