There haven't been many good comedies in the last few years, which might explain why Neighbors has become such an unexpected phenomenon. The Seth Rogen/Zac Efron film about a young couple feuding with a fraternity has grossed $90 million this month, even knocking The Amazing Spider-Man 2 from the top of the box office. The movie's success is very simple: It's extremely funny. We felt this was a good time to poll our readers to determine their favorite comedies of all time. Click through to see the results.