Best of 2011: Cheating Scandals of the Year
Justin Theroux, Heidi Bivens, Jen Aniston
Did Jen pull an Angelina? Insiders told Us that Aniston "went after" Theroux on the set of Wanderlust last fall -- despite his 14-year relationship with live-in love Bivens. "It didn't matter that he was already with someone," the source said. Theroux abruptly left Bivens in spring 2010.