The last movie I saw in theatres was Scary Movie 3.
I thought it was very funny, and not much more. It's a great comedy, very stupid, but funny stupid.
My favorite joke/reference in the movie was when they did a Signs scene where the guy that crushed the protagonist's wife against the tree with his truck, looks at her husband when he arrives at the scene of the accident and says, "Hey Frank, I'm gonna need a ride home."
I forget the names, but you get the idea.
It was stupid funny, and I enjoyed it.
It helps if you've seen the movies referenced, as that really adds to the humor. You will get the references then, and not just be laughing at a random situation.