Inaugural Fashion Dos and Don'ts

President Barack Obama and first lady Michelle Obama dance at the Neighborhood Inaugural Ball in Washington Jan. 20, 2009. After weeks of secrecy, the first lady debuted a one-shoulder, floor-length white gown by designer Jason Wu. The Taiwan-born, 26-year-old designer crafted a fashionable chiffon number with silk flowers and crystals scattered over the entire dress. (Alex Brandon/AP Photo )