Just Good Friends isn't the greatest of Michael's songs, but it's one I've always liked.
Another collaboration between Michael and Stevie Wonder was on a song called All I Do, from Stevie Wonder's Hotter Than July album (released in 1980). Michael sings the chorus of the song "All I do is think about you", and then bits in the bridge of the song "I'm thinking baby, bout you baby". If you haven't heard it, your in for a real treat because it's a brilliant song.
All I do
http://www.youtube.com/watch?v=8Ldy3anlSoQ&feature=related