Movie Mash-Ups

Okay, big thanks to Cat for the inspiration, but I'm afraid my head is going to be whirling with these for a while. For now, I'll give you the best I've come up with.

1. Johnny Depp befriends a boy who's mother is dying, writes a children's classic and helps a group of little lost dinosaurs reunite with their families.
2. A little girl discovers a belief in Santa Claus thanks to a large department store and Keanu Reeves, the only good cop in all of Los Angeles.
3. Four friends go for a bachelor party in Vegas, only to lose the their memories and the groom, and discover Sylvester Stallone arm-wrestling.
4. Brittany Murphy follows her boyfriend to Japan, where he dumps her. She learns to cook while Angelina Jolie spends time with Winona Ryder in the loony bin.
5. Queen Latifah changes Steve Martin's life forever as an unwelcome guest, as unwelcome as the dead bodies in Rob Zombie's timeless masterpiece.
6. George Clooney flies around the country firing people while Brendan Fraser, Steve Buscemi and Adam Sandler hold a radio station hostage until their demo tape is played.

That's all for now. Leave me comments if you can't figure out the answers, although IMDb is wonderfully helpful.