In terms of interactions but not meetings, then I have had a shouting conversation with GaGa (we couldn't hear each other in the theatre so shouted and it ended in my getting a piccy of her looking at me) and I have stood next to Brad from The Vamps.
I'm sure I walked past Bear the other week too but I think it was just someone who looked like him as his insta showed him on a beach that morning and I live in The Midlands
