I can honestly say I've never had a celebrity sighting, at least as far as I'm aware of. Maybe I just wouldn't know a celeb if I saw one in public. Mind you, if I was a celeb, I'm not sure I'd want to be recognized in public much anyway, so maybe it's all for the best.
I mean, they say you should never meet your heroes because they'll always let you down. But for these folks who rubbed elbows with some glitterati, it wasn't a letdown at all.