What is the funniest Anime movie you can recommend?

I host a weekly movie night with lots of my friends. Usually I pick the movie, but I’ve had several requests for an Anime film, and I don’t know what to choose because I don’t usually watch that particular genre. This group usually goes for comedies, or at least light-hearted films. I’m looking for something feature-length and not part of a series.

Can you suggest any titles that you know will make people laugh whether or not they are fans of anime?