The Dutchess was wearing a $200 dress whereas Mrs. Obama was wearing a $2,000 dress. Your point is invalid.
Actually, it was 175 pounds and apparently made in a sweat shop. A much better image for our times:
Regardless, what forum are you guys on? I try to dress well, the First Lady represents all of us, and I want her to dress well. She more than holds up her end of the bargain.