Paul Giamatti will join Tom Cruise, Alec Baldwin, and Mary J. Blige in Rock of Ages. Director Adam Shankman says Cruise’s voice lessons have been going great, and that Giamatti will play “a sleazy Hollywood agent-type … who basically ends up representing the corporatization of music and sort of the death of art.†Oh, tell us more about the corporatization of art, Adam Shankman, judge of So You Think You Can Dance. [Wrap]