Michelle Obama wore a white skirt and an embroidered jacket from J. Mendel's 2013 resort collection to a reception at Buckingham Palace on Friday night, before attending the opening ceremony of the Olympic Games. The next day, she went to a swimming event wearing a green BCBG Max Azria top and black pants, followed by a tennis competition, for which she changed into a black-and-white dress by Tracy Reese and a polka-dot cardigan. On Sunday, she chose a gray T-shirt and sweater with white pants for a preliminary men's basketball game. And finally, today, she picked a sporty blue jacket, gray shirt, white pants, and metallic flats to visit a U.S. Air Force base before departing from the U.K. See all of the First Lady's Olympic outfits in our updated Michelle Obama Look Book.