I'll tell you what's worse!
Having the damn tune stuck in your head and not even knowing what it's called. For years I've had the song "Popcorn" by Hot Butter swirling around in the background. It took me until a few months ago to find the damn thing. At least I know I haven't been halucinating all these years.

There's another one from about the same time that has the line "cat on a hot tin roof" "Baby what do you think your doing to me" and "Get down, get down, get down, your a bad girl baby and I don't want you around, around, I don't want you around"
I still have no idea what this song is called or who performed it.