I never considered myself to be a real big Michael Jackson fan, but now that he's passed and I keep hearing his songs, I realize how much I loved his music. It takes five seconds of hearing a song, and it's stuck in my head all day.
Right now though, I would say - Rock with you, Human nature, Man in the mirror, Billy Jean, Thriller (video included), and The way you make me feel.
All of them are great, I can't really pick a favorite. But if anyone comes on, I'll be singing it all day in my head.
-R.I.P-