Good movie for a movie night?

My parents are out of town, so my little sisters and I are inviting some friends over for a super movie night. I'm 18, one of my sisters is 15 and the other is 14. We're all inviting a few friends, and it'll be co-ed. We're throwing a Gilmore Girls style party, with pizza, Chinese, and Mexican food. We want to watch a clically funny movie. Our family's favorite movie is Young Frankenstein, but we've done too many movie nights with that one. We were thinking Ghostbusters or something similar. I'm not into stupid and gross comedy, like 40 Year Old Virgin, or Napoleon Dynamite. My sister suggested Ferris Bueler's Day Off, which would be a hit, but I'm looking for some more suggestions also. 80's movies are fantastic, as my friends were born in the late 80's and appreciate the quality. Any help is great! Thanks!