Miley Cyrus and Liam Hemsworth have officially sung their last song. After dating for more than a year, the pop princess and her Australian beau have split, his rep confirms. The couple met on the set of The Last Song in 2009, and Miley regularly gushed over the hunky actor. "Liam was the first person that made me want to be in a real relationship," she recently said. The teen queen previously dated fellow singer Nick Jonas and model Justin Gaston.