I used to work at Cropredy Festival, I went backstage to the big marque were all our stuff was and I saw this bloke standing by the entrance. It was one of those "Where do I know you from ?" moments, after a few minutes I remembered where I'd seen him before, it was Robert Plant !
Bumped into him a couple of times there. And Billy Conolly. And Ade Edmondson. Good place for celeb spotting.