Zac Posen and Dita von Teese, in a dress by Posen, on the red carpet at the Metropolitan Museum of Art's annual Costume Institute gala in New York, May 5, 2014. The gala this year honored the British-born designer Charles James, who revolutionized American fashion in the mid-20th century, and the longtime Vogue editor Anna Wintour. (Josh Haner/The New York Times)