I've met a few like Queen Latifah, Beyonce, etc., but none that I can say was a life-changing experience. I will probably meet more at Comic Con. Mostly it was only superficial meetings with them. I can only say I've had two proper interactions with celebrities before -- one by email and one by phone. All the in person ones we're weird to me.

I still haven't met Tina Fey. >=(