I've had run-in's with some famous people. I don't think I can remember all of them because it's mostly musicians, but I did meet Toby Maguire once when I was like 12 or 13? I was in NYC with my parents, and we saw a crowd outside one of the late-night talk show doors and it was Toby when he was promoting the first Spiderman movie. He only signed autographs for the kids so I managed to get his autograph as he was heading in to the building.
Other than that, I met Frank Turner at Reading Festival. I met the singer from Anti-Flag at the Vans Warped Tour in 2007 (or around then, I can't even remember haha). I know there are tons of other people in the music scene that I had met or been exceptionally close to (I got to watch Les Paul play in NYC in a tiny cafe) but like I said, totally drawing a blank.
Fun fact though : The figure skater Nancy Kerrigan practiced in my home town and her parent's lived there. I did meet her several times as I took skating lessons when I was a kid at the same rink and they were directly after she would practice. She is....not a very nice person....but there's far worse people lol