Last night, Michelle Obama was in New York for the Time 100 Gala. She wore a full-length, New York–appropriate black dress by Michael Kors and a corset by Peter Soronen, with several necklaces by Loree Rodkin, and diamond stud earrings. Her swept-up hair showed no sign of the humidity and drizzle outside. See the full look in the Michelle Obama Look Book. Update: Mrs. O reports the dress is by Michael Kors and the corset belt is by Peter Soronen.