What are good movies for a girl/boy party?

Iam looking for scary movies, but a few comedies any good recomendations?

I got some scary movies for you...The Hills Have Eyes and The Hills Have Eyes 2...The Messengers...Slither...The new Halloween movie...thats all I can think of I'm not sure about comedies and whatever you do dont buy the movie Bug its stupid...

Dead silence and wind chill

Some good movies are: Live Free or Die Hard , Eurotrip, Texas Chainsaw Massacre: The Begining, School for Scoundrels, Employee of the Month, Resident Evil, Silent Hill, Disturbia, Cry Wolf, Evan Almighty, Grindhouse: Planet Terror, Knocked up, and Mr. Brooks. Those are all I can think of for now!

I'd suggest Garden State - both guys and girls really like it, its one of my favourite movies and has Zach Braff of Scrubs fame, and Natalie Portman of... well, where do I begin - she's only like the most talented actress of like all time (or will be!). Seems a bit of an odd movie if someone's trying to explain it to you, but its awesome, it really is.

hot fuzz is a really good movie ..really funny...good for a party...american pie is also good for a party...I think,,,