The O'Jay's: "Used to be My Girl" - One of the best pure grooves ever captured on record, and a perfectly sung song. Here they are in 1988.

 
Ohio Players: "Sweet Sticky Thing" - The rumors that Betty White posed on one of the Ohio Players album covers are ... tantalizing.

Frank Sinatra: "I'm Walking Behind You" - Surely Sinatra's creepiest song, the lyrics of which recount his disappointed love for a woman who is now getting married. "Look over your shoulder," he sings, "I'm walking behind." That's not walking, it's stalking.