Undeux said:
Lucianno Pavarotti (totally mispelled that) babysat me once.
That's unbelievably sweet. I don't know if there's more to tell about that, but I'd love to hear the story.
As for me, the only real celebrity encounters I've had were due to political stuff.
I was a college organizer for the Obama campaign from August to November 2008, and so when Howard Dean came to speak at a nearby school, I had the chance to go. I shook his hand, got a picture, talked with him for a little while... he's a little intense, but seemed to be a nice guy. I didn't bring up The Scream.
Martin Sheen came to speak at my school on behalf of Al Franken in 2008. The man is batshit insane. In a good way. I'm not sure whether it was his idea or not, but I saw him bless a pregnant woman's unborn child. Catholicly. But it was actually pretty cool. He was supposed to get up and speak in in a decently packed ballroom-type building when all the power went out. There were a fair bunch of windows, so it didn't affect the lighting all that much, but, obviously, no microphones. He didn't care. He just got up in front, and in quite possibly the most booming voice I have ever heard, proceeded to speak at length for at least half an hour on poetry, politics, religion, and the merits of Al Franken. Very cool for a West Wing fan. I got my picture taken, shook his hand, talked with him for a minute or so... that sort of thing.
Also in the West Wing/Al Franken vein, Bradley Whitford came to my school a couple days after the 2008 election. At that point, we knew there was going to be a Senate recount, and for whatever reason, Al's campaign decided to host their fire-up-and-train-the-volunteers meeting at my school. And, for whatever reason, Al decided to bring Bradley Whitford along. He had a mustache. It was kind of weird.
I met Kal Penn (Kumar, that guy from House, and now a member of the Obama administration) twice, once during the February primaries, and once about a month before the actual election. He was part of the Obama campaign's college celebrity outreach division. (Our snotty rival school got Scarlett Johansson, so screw them.) But anyway, on his first trip, as I was part of the school's College Democrats contingent, I got to sit in our cafeteria and eat lunch with him as hundreds of random students realized what was going on. Second trip, I escorted him from his car to where he was speaking. He's a genuinely nice guy, and it's too bad he'll always be known more for being Kumar than just about anything else.
I also think I met golfer Tom Lehman once when I was about 8.