After co-hosting the Met Costume Institute Gala on Monday (May 3), Oprah Winfrey let loose for some “Hot-N-Fun” with Pharrell, Diddy, and Usher at the after-party at New York City’s Mark Hotel.

Vogue editor-in-chief Anna Wintour asked N.E.R.D. to perform at the exclusive event, where the in-style crowd sweat through their designer suits and gowns while dancing to the band’s rap-rock hits.

DJ Cassidy worked the ones and twos, as a wild Katy Perry provided further entertainment with her light-up dress. Now that’s a party!