Breaking up is hard to do -- except in Hollywood, where lasting love is often more fleeting than lasting fame. But even by movieland's standards, this year was especially rocky for celebrity couples, with many relationships that seemed on solid ground coming to surprising ends. Here are some of 2010's shocking splits, starting with the one that grabbed the most headlines ...

Sandra Bullock & Jesse James
After being crowned the queen of awards season for her role in 'The Blind Side' and gushing over her husband of five years during every acceptance speech -- in one she thanked him for "having her back" -- Sandra Bullock found herself truly blindsided when rumors surfaced days after the Oscars that Jesse James was cheating on her. Tattooed model Michelle McGee dropped the bombshell -- and earned herself that nickname -- when she came forward with lurid details of her affair with James while Bullock was away filming. Soon, other women followed suit, telling their own tales of James' infidelity. Bullock moved out of their house and proceeded to adopt the son they planned to raise together, Louis, as a single mom. Their divorce was finalized in June.