Rihanna has traded in her ex-BF, Shia LaBeouf, for an older model Hollywood hunk. The singer was spotted hooking up with Josh Hartnett on Thursday night at a club in New York City, sources tell Us Weekly. The couple, who met up after Rihanna's concert that night at the Nokia Theatre in Times Square, "didn’t come together, but left together," the insider says. Aw, poor Shia!