On the red carpet at the Metropolitan Museum of Art's Costume Institute Ball, David Koch of Koch Industries was feeling lavish surrounded by Gisele Bundchen, Gwyneth Paltrow, Scarlett Johansson, Emma Stone and Jessica Pare.

"On nights like this, you spend," Koch said of the $10,000-a-ticket benefit to support fashion exhibitions. His Harry Winston tuxedo studs with diamonds and emeralds sparkled.

-- Amanda Gordon

Gisele Bundchen wore Givenchy haute couture by Riccardo Tisci.