I've met Andrew 'Dice' Clay once. we were at a college fair which was connected to a hotel downtown and he was playing in town that night, we happened to bump into him.
I've also met all the members of Barenaked ladies and Cowboy Mouth (Who're they?) several times. I also 'met' Robin Williams once when we decided to hang out outside his hotel waiting for him to come out on his way to a gig, and then being swarmed by about 20 autograph seekers.
My Buddy, on the other hand, a 'professional autograph seeker' ('grapher) has probably met every professional wrestler and baseball player you can think of. (At least I was impressed when I saw his collection)
That is all.
