Once Bitten is a vampire movie with Jim Carey, now I won't go into detail, but the bit I find hilarious every time is the fact the female vampire has to take blood 3 times from a virgin from as close to the source of that virginity as possible (they went for inside thigh - its not 18 rated ;)). It made me laugh the first time I saw it and every time since :), because Jim Carey reacts so beautifully each time.
P.S. Christopher Moore writes hilarious books.
Rockula. Now if a movie about a vampire who creates his own band so that he can get to his long lost girlfriend isn't silly enough, the curse in this film is brilliant. It's very funny and superbly done. Every century Ralph (our vampire lead) re-finds his long lost love, but she is curse to be killed by a pirate, wearing a rhinestone peg leg, wielding a ham bone. It is as ridiculous as it sounds.
This movie is brilliant, BTW, and I am sure I will revisit it in a later post. I feel one about comedy vampire movies coming on :).
Sundown The Vampire In Retreat. They make me giggle every time I watch the movie because they're just so silly, but so right for the movie.
So this is my list, tell me yours :)