Kellan Lutz is single for the summer! The hunky Twilight star broke up with Australian actress Sharni Vinson in early May, several sources confirm to Us Weekly. Lutz, 28, and Vinson, 29, were first linked in September 2011. Ironically, the former couple met during a chemistry reading for Step Up 3D. Though Vinson won the role of street dancer Natalie, Lutz never appeared in the dance flick. In the early stages of their relationship, Lutz often gushed about his compatibly with Vinson.
