Kevin Mazur/Getty Images; Jason Merritt/Getty Images
Both Mandy and J.Lo grace the 2010 Academy Awards in stunning, sparkly Armani Privé gowns. So who's the better belle of the ball?
While you're indulging in your favorite pastime of pitting fashionistas against each other, check out E!'s Red Carpet Pose-Off Game.
Make the call, and you could win a Tiffany Circle Diamond Pendant. You know you want some Oscar swag!