Look back on the breakups that rocked Hollywood this year
AnnaLynne McCord and Kellan Lutz
The Twilight actor and McCord split in October after two years of dating. The actress later debuted her latest boy-toy, model Aaron O'Connell, at a Halloween bash in Las Vegas. "Only a couple of guys get a chance with her!" McCord's 90210 costar Matt Lanter joked to Us.