"I Think We're Alone Now"

I've been meaning to mention this...
I have had this horrible song in my head since last Friday. I believe it was a hit for the singer Tiffany, she of the Mall concert era. I have no idea where I heard it, or how it got in my head. I'll think it's passed, and then I'll be sitting at my desk working, or driving home, and suddenly realize I'm hearing " the beating of our hearts is the only sound". I hate this song, it's driving me nuts. And yet I can't figure out why I'm not letting it go.