Umm, I stood next to Matt Dawson, the former England Rubgy Player on the London Underground, then ended up following him down the street after he got off.
I also (literaly) bumped into Jimmy Carr, the comedian when he was carrying cheesecake
Oh, and I also walked past Boris Johnson while he was on his bicycle in London.
So yea, I never meet celebrities, I just seem to bump into them a lot.