These days Mariah Carey's in a sling, thanks to the busted shoulder and bruised ribs she sustained on the set of her latest video.  But that's getting off easy compared to the duel between Mimi and her evil twin Bianca in the clip for 'Heartbreaker' from the 1999 album Rainbow

Mariah was one of the first mainstream artists to feature Jay Z on a pop song.  Hova actually takes this track to a whole other level.  Plus cutie pie Jerry O'Connell plays Mariah's cheating boyfriend.