I always get Billy Joel, We didn't start the fire" stuck in my head. Somewhere on another thread about this subject, someone posted an article that basically said one of the few ways to get a song unstuck is to sing it all the way through.
Do you know how long it took me to learn all the words to this song, and to be able to remember it all, in order, so that I could unstick it from my head?! TWO MONTHS. I get the song out every once in a while, but sometimes, I just start hearing "Harry Truman, Doris Day..."
Argh...