Who are your top 10 most annoying celebrites?

I'm going to put together a tournament style bracket for most annoying celebrity. Give me a list of who you think are the most annoying celebrities. It can be more than 10 if you want. They can include, Actors, Actresses, Sports Figures, Announcers, Hosts, etc... Anybody who is known for being viewed on Television. Have fun! in no certain order....
barack obama
rosie o'donnell
justin beiber
ellen degeneres
george w. bush
wanda sykes