Here's Michelle Obama on the cover of the Vogue March 2009 issue wearing a dress by Jason Wu. Obama is only the second First Lady to appear on the Vogue cover. The first was Hillary Clinton in 1998.

Michelle Obama does not contact fashion designers about choosing their dresses. She picks her dresses herself and the designers only find out about their great luck later. See the video below where Jason Wu expresses what it felt like when he found out the First Lady had chosen his gown to wear on Inauguration. He was at home eating pizza and watching the event on TV when he saw Michelle in his dress. He phoned his mom right away. And his phone hasn't stopped ringing since.