When it comes to movie magic, romance plays a big part. Not a problem if you're an on-screen couple like Twilight's Rob Pattinson and Kristen Stewart. For this duo, and others topping Forbes's list of highest grossing movie couples, chemistry comes easy and the box office payoff is huge. So, I'm putting you to the test. Do you know which of these talented pairs topped the list and helped their movies turn the biggest profits in Hollywood?