Best of 2011

Over and Out! The Year's Biggest Breakups

From Ashton & Demi to Arnold & Maria, 2011 was the end of the road for these star couples

SCARLETT & SEAN

After her 2010 breakup from Ryan Reynolds, Scarlett Johansson rebounded with Sean Penn over their mutual interest in Haiti relief efforts. By May, the pair went public at the White House Correspondents' Dinner afterparty in Washington, D.C., only to split a month later.