In this battle of short, slightly overweight, average-looking funnymen, Jack Black definitely has seniority. You could say his most recent movie Year One establishes him as the forefather of that field. That said, young movie upstart Zach Galifianakis is taking the comedy world by storm with The Hangover. Both comedians know how to get audiences laughing, but judging by the box office (Year One debuted at No. 4; The Hangover at No. 1), Black might want to watch his back! Which jokester makes you laugh hardest?