Ok, we all hate some of them, so list the ones you hate and why. I'll start.
Pink - I guess I hate her because she is such a piece of unbearable white trash. Her music is terrible, and she looks my a$$ if it caught on fire and someone put it out with a t-shirt.
R. Kelly - I don't think it is necessary to list a reason for hating this guy. I mean, come on.
Frankie Muniz - This little prick just annoys me. Not sure why, but I am sure that I can't stand the sight of his face.
Ashton Kutcher - Over-saturation would be the cause of this one, I suppose.
Mario Winans - Because of his single "I Don't Want To Know". It's a song about how he doesn't want to know if his girl is cheating on him. Dude, please grow a pair, for the sake of all mankind.
If I think of more, I'll add them. So, which celebs do you hate?