Stand-up comedy is tough—take it from John Mayer. This past May, the soulful crooner mustered up enough nerve to get on stage at the Comedy Cellar in NYC and pull off his best impression of the dudes below. That is, he tried to be live, funny, and the only one standing. The reviews were mixed, but you got to give Johnny credit for attempting one of the most difficult jobs out there. Yesterday we asked you to name your favorite female stand-up comic. So, who is your favorite male stand-up comic of 2007?