Living in London I come across celebrities quite a bit, always when I don't expect it. LOn Friday I was in Top Shop on Oxford Street and saw the women that's just left Coronation Street (can't remember her name) - tried not to stare.
Where I used to work along Ladbroke Grove (north end not the posh south end), I used to see loads of semi-famous celebrities (actors and comedians mostly). All I ever used to think (hope I didn't say it outloud) was why would you live around here its a sh*t hole. Now I know you're asking how I know they lived there, only ever saw them in the morning.