What movie stars/singers have you met and what were they like?

ive seen hilary duff and hailey duff and they were very sweet. they said hi first, and smiled at me. R kelly was arrogant and so was jc chasez, mary j blige was a diva, 50 cent was real cool, samuel l. jackson was very down to earth and so was ellen degeneres, lebron james was cool/funny, carmelo anthony had better things to do, dwayne wade was sweet, ll cool j is very nice, and jay z was sweet, actually kinda shy... whats your experiences?