Katy Perry, the star who once showed up to a Met Gala afterparty dressed as a hamburger knows how to steal the show with her top-notch sartorial game. For her return to the Met Gala this year, the Roar singer wore something intriguing and no, it's not a glittering, crystal-adorned chandelier dress or a giant feathered angel wings, but a classy sassy Oscar de la Renta dress. The 37-year-old star looked breathtakingly beautiful in her sophisticated yet elegant one-shoulder gown. The gorgeous blac