Earlier in the week we had Jeremy Renner (The Hurt Locker) dissing Justin Bieber’s noisy chip eating in a 2010 MTV Movie Awards promo, and today we have Tom Cruise revisiting his Tropic Thunder character, Lex Grossman, and giving Robert Pattinson (The Twilight Saga) the third-degree over his scruffy appearance. If this is a prelude to the kind of spoofs we’ll see during the actual June 6 awards telecast, I might be changing my tune and not just watch for my Katy Perry fix.