They say imitation is the greatest form of flattery.  If that's true, then Denzel Washington, Will Smith, President Barrack Obama and Eddie Murphy should be extremely flattered.  Saturday Night Live's Jay Pharoah did his best impersonations of all 4 for David Letterman.   Eddie Murphy is my favorite.   Which one do you think he did best?

Jay Pharoah as President Barrack Obama

As Will Smith

As Eddie Murphy and Denzel Washington