My President Obama at the Neighborhood Ball

The first stop of the evening for the President and First Lady was the Neighborhood Ball, where they danced to Beyonce, left. Their appearance put to rest the speculation over what Michelle Obama would be wearing: an ivory silk chiffon gown, embellished with organza and Swarovski crystal rhinestones and silver thread embroidery designed especially for her by New York designer Jason Wu.

From The New York Times.