7. Mickey's PhilharMagic (Fantasyland, Magic Kingdom)
Not only is Mickey's PhilharMagic a great way to escape the crowds and sunshine on a given day, it also rarely has a long line for you to wait in. The "concert hall" theater for this 3D movie musical is enormous, and the show is only 12 minutes long, so the Magic Kingdom would have to be extremely busy to affect the time you spend in line for the show.
Save your FastPass for something more worthwhile, like Haunted Mansion, Pirates of the Caribbean, or Peter Pan's Flight. Those are the kinds of attractions that really build up long lines, and you'll thank yourself for not throwing away a FastPass on a show that you'll practically walk right into almost every time.