Last night marked the finale of MTV's Movie Awards Sneak Peek Week, and stars Julianne Hough, Diego Boneta, Malin Akerman and director Adam Shankman were on hand to present "Rock of Ages" and host a 30 minute Q&A following the screening. [ video unavailable on this device ] "Rock of Ages" doesn't hit theaters until June 15, but for now, you can satisfy your fix with this exclusive clip we debuted last night. In it, we see Julianne Hough's Sherrie Christian and Diego Boneta's Drew Boley start rocking out...