Michelle Obama's ivory Jason Wu gown was just one of many stunners at the Inaugural Ball events. And it seems like our First Lady's one-shoulder look is already trendsetting: Ashley Judd also wore a one-shoulder gown in a lavender hue, as did Jennifer Lopez, who looked stunning in mint-green Marchesa. Golden hues also hit big, as both Beyonce and Ashanti chose champagne-colored floor-length gowns, while Kerry Washington bedazzled her cocktail dress in a million gold beads. But Pete Wentz must have missed the whole black-tie memo, as he showed up in a T-shirt with Batman and Obama logos. Classy. And that's not all. To see what everyone else wore to the Inaugural Ball, click ahead.