Sol Campbell - shook his hand. I was getting new speakers put in my car. He was getting his ride pimped out!
Forrest Whitaker - shook his hand in Trafalgar square
Jeff Foxworthy - shook his hand in a lift at a hospital (my wife was in hospital for a few days)
John Caparulo - shook his hand after an event.
Naughty By Nature (Treach) - shook his hand after an event
The Atlanta Hawks players (Bibby, Al Horford, ZaZa) - autographs, at an autograph party. They do it yearly.
I'm sure there are more, but, you know how it is, old age kicking in and all that. Memory isn't what it used to be