There are quite a few famous people who instantly irritate me when I see them on TV.
1) Tony Blair - He reminds me of a puppet, I just find his pretend smiles so insincere. I think he has a crush on the US President 
why else would he follow him round like a puppy 
2) Ant & Dec - (UK TV Presenter Duo) Agggggghhhhh, I just don't find their childish behaviour funny anymore (I must be too old)
3) Michael Schumacher - OK he may be the best Formula One driver ever, but, he just annoys me. I cant explain why, he just does
So why not list three people who instantly annoy you, please make sure that at least one of them is internationally known ;-)