The British group Hot Chocolate released You Sexy Thing in 1975. It reached No. 3 on the U.S. Billboard pop charts in 1976.
Whenever I hear this song the first thing that comes to mind is The Fully Monty (if you don't know what that is, think "earlier more comical version Magic Mike"), which I have a hard time believing is already 18 years old.
Multiple sources insist the film is from 1997 though, so I guess that's the case...