I'm not sure I agree about the musical numbers, but I think you're right on the mark when it comes to the action films.

Tip 3: If it's got Jennifer Aniston in it, it will be either mediocre or downright awful. That's not her fault, particularly, by the way...she can't help it that she keeps getting cast in lousy movies.

Tip 4: If Roland Emmerich had anything to do with it, it will be absolutely bloody awful and loaded with excessive CGI and little else worth mentioning! Save your money. Don't even rent it from the corner store 6 months later, cos it won't be worth the $5 or the time.

Tip 5: If it's about teenagers, there's a 49 out of 50 chance that it won't be worth watching. The very rare 50th chance can be surprisingly good. Wait for it, but don't hold your breath.