Haha, this is a funny question.  There are PLENTY of tunes that I'd rather hear nails on a chalkboard than listen to them.  Pretty much anything from Beyonce will make me keel over.  And I agree w/ gitbean....the Baha Men's "Who Let The Dogs Out" is so bad!  "Lost Without You" by Robin Thicke is another one that makes me throw up a lil in my mouth, LOL.