On, off. On, off. Some stars seem to treat love like a light switch. Well, we guess they need to have at least one bad point to balance out all that luck in fame, success, wealth and good looks.

- Is "the one" out there for you?

Feeling steady? Then take a look at these rollercoaster celebrity romances. And maybe feel just a teensy bit grateful that you’re not in a less than perfect relationship in full glare of the world's paparazzi.