Top celebrity headlines of 2011

4. The breakup of Arnold Schwarzenegger and Maria Shriver

This political power couple had been together since the late '70s, and had managed to mostly keep their relationship out of the tabloids. However, in May 2011 their union became front-page celebrity news when it was revealed that not only had Schwarzenegger stepped out on his wife, but he fathered a child, now an adolescent, with their housekeeper -- a secret that had remained under wraps for years. As of December 2011, Shriver and Schwarzenegger are heading toward divorce, although the split appears to be amicable.