Christina Aguilera is guest-judging tomorrow's episode of Project Runway! The designers are making her a Bob Mackie-style dress (Mackie = long time designer for Cher + Cher is in a new movie with xtina). As an added bonus-Nina Garcia is finally back! I haven't seen the full episode but you can count on Nina to bring the sassy comments. I can't wait!!!!! Will you be watching? Peep the trailer below.