I once performed with one of Finland's and one of Sweden's most famous stand-up comedians. In the same show, that is, and then hung out with them in the green room. Really, really nice and funny people, too.
Well, I guess the funny part is sort of obvious.
EDIT: Oh, wait, celebrities? I guess I fall on the whole famous-in-Finland-and-Sweden part, then.
EDIT 2: Now that I think about it, Ive met tons of famous finns. Politicians, actors, directors, comedians, writers, poets...
It's a very small world over here. Especially if you're part of the *hrm* swedish-speaking minority..