I’d be surprised if Tom Cruise‘s performance as Stacee Jaxx in Adam Shankman‘s Rock of Ages (New Line/Warner Bros., 6.15) isn’t some kind of hoot. Cruise always slams into a role, gives it 110%, etc. But something about this image doesn’t fly. He just doesn’t seem believable as a Steven Tyler-ish rock ‘n’ roll horndog. Has he exuded any palpable sexual vibes since Risky Business? Cruise always plays guys ruled by passion, determination, doggedness. But getting into women’s pants? Not so much.