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

RYAN & AMANDA

It was a Halloween to remember for Amanda Seyfried and Ryan Phillippe, who met at Kate Hudson's annual bash in 2010. "They're really into each other," a source told PEOPLE, after regular sightings of the pair together in L.A. confirmed their blossoming romance. But when Phillippe's former flame, Alexis Knapp, gave birth to the actor's third child in July, Seyfried moved on with New York real-estate exec Andrew Joblon.