Rihanna and A$AP Rocky stun at Met Gala.

Pregnant Rihanna made a stunning return to the Met Gala in a white Valentino gown with a silk cape made of embroidered white flowers and a 16-foot train, paying homage to the late Karl Lagerfeld. She was accompanied by A$AP Rocky, who sported a black suit jacket and kilt. The theme of this year's Met Gala is "Karl Lagerfeld: A Line of Beauty," and the exhibition features 150 of Lagerfeld's designs from Chanel, Balmain, Patou, Fendi, Chloe, and his own personal line.