A clown-whore's doin' it with your ex-girlfriend

The story:

I was in the car with a friend of mine and the song was playing. We having a conversation when she stopped, looked puzzled, and asked "A clown-whore?". I about died lauging when she told me what she thought she heard. I didn't know the correct lyrics at the time, but I knew that couldn't be right. So we looked it up on the internet when we got home and laughed for hours.