I heard you've been sleeping around with Bill
When you spend the weekend in Beverly Hills

The story:

I was singing the song at Karaoke and all proud of myself that I didn't even need to look at the screen. When I sang that line, half the bar started snickering, and when I looked, I noticed my mistake. It was okay, though because they thought I had done it on purpose. (I have a habit of making up new lyrics for Shania Twain songs. You should hear what I've done to Man, I Feel Like A Woman :)).