6. Rihanna and Chris Brown

The pop star Rihanna split from Chris Brown in February after he assaulted her in a vicious fight that landed him with a community service order and five years probation.

The "Umbrella" hit-maker returned to the spotlight in November, finally speaking out about how her life has changed since the altercation.

Chris Brown has acknowledged that his attack on ex-girlfriend Rihanna has damaged her for life. "I can see what damage it does, mentally, more than physical... I was wrong for what I did. And I would definitely say that it's not something that I look past or look over," Contactmusic quoted Brown as saying on a U.S. news show.