I've had Tiny Dancer by Elton John stuck in my head for a good two days. I was singing it under my breath at work today, when the girl who was on with me looked at me strangely.
Me: What? Her: Did you just sing "Hold me closer, "Tony Danza"? Me: (in open-mouth horror) Why would anyone ever sing that?! Her: I don't know - but if I had to hear it from someone, I'd expect it to be you.