Scream 3 (Lydia)

"I am not a Randy substitute. I'm a completely different character."
"Named Ricky, who works at the video store."
"...it's an homage."

On the whole, I am not really a fan of the Scream movies. They are often praised for their self-awareness, the fact that they take place in a world informed by horror movies and populated by people familiar with the rules of horror movies, but to me it was not until Scream 3 that Wes Craven's franchise really transitioned from slasher movie to parody of slasher movies. The story is like this: having defeated the killer in the first two movies, Sidney (Neve Campbell) is hiding from celebrity in the mountains; meanwhile back in Hollywood, filming is underway on Stab 3, the third in a series of movies based on Sidney's real life, when actors in the film begin to get murdered. The film opens with Liev Schreiber's cameo, much of which he spends complaining about the fact that he has only a brief cameo in Stab 3, and from that moment forward Scream 3 is constantly self-referential. Almost every character makes explicit through dialogue their relationship to the characters of the previous films and of the real life story on which the Stab films are based. In the scene that really won me over, Roger Corman plays a studio executive, who calmly explains to the director why violence in movies is a "big deal right now." The whole relationship between Gail Weathers (Courtney Cox) and the actress (Parker Posey) -- named Jennifer, who used to date Brad Pitt -- who plays her in the movie is always fun, and nobody acts like a bad actor like Parker Posey acts like a bad actor.

(Note: Inexplicably, Neve Campbell is in all my guilty pleasure movies.)