We've always loved the glamorous gowns worn to the Metropolitan Museum of Art's Costume Institute Ball every spring. This year, the fashion exhibit opening at the museum features couturier Charles James, who designed the most beautiful and brilliantly constructed ball gowns and dress clothes the world has ever seen. James' influence was surely felt on the red carpet, with many attendees in gorgeous and dramatic gowns in jewel tones and blush pinks. We chose a few favorites for color, style and overall panache. The best dressed attendee of the night for us is Karen Elson in Zac Posen; she looks like a modern day John Singer Sargent painting (bottom right). Head over to Vogue for more pictures.