This might be the greatest website of all time: http://awesomepeoplehangingouttogether.tumblr.com/ 

I suggest only check this out if you don't have anything important you need to do. An hour will go by before you know it. 

Robert Downey JR and Slash

Dean Martin and John Wayne

Chuck Berry and Keith Richards

Freddie Mercury and Elton John

Russell Brand and the Dalai Lama

Alice Cooper and Salvador Dalí

Get more HERE