The hit TV series America's Got Talent is used to having big voices (um, paging Susan Boyle, from the British version) and wild performances on its competitive stage...so naturally over-the-top Broadway hit Rock of Ages fit right in on the show's July 14 episode. Constantine Maroulis, Emily Padgett and the Rock of Ages cast (including those slinky chorus gals) brought down the house with an arena-worthy combination of rock classics "I Wanna Rock" and "Don't Stop Believin'," complete with a surprise appearance by Twisted Sister frontman Dee Snyder in all his 80s rock glory. While the spectacle itself was a crowd-pleaser, the real fun is watching judges Howie Mandell, Piers Morgan and Sharon Osbourne react to one of the most un-Broadway "Broadway" performances the show's ever seen.