I've met several world-renowned jazz musicians, but of of you likely haven't heard of many of them. Most notably, Ari Hoenig, Bob Mintzer, Mark Guiliana, GoGo Penguin, Wayne Bergeron, PJ Perry, Nate Wood, and I've performed on stage with Terell Stafford.
Aside from them I met Adrian R'Mante (the guy who plays Esteban in the Suite Life of Zack and Cody) at the mall once. I also used to live across the street from Aaron Volpatti, who played for the Vancouver Canucks and later the Washington Capitals. My old childhood social worker was the parent of AJ Buckley, who was a main character in CSI: NY. I have also met the band Hedley, though that was before they were famous (we had VIP passes to their show). The latest celebrity encounter I can recall was when Justin Trudeau was at my school, though I only saw him through the window.