John Mayer, Katy Perry Alina Silvestera, Joey SilvesteraRobert De Niro, Kathy GriffinHelena Christensen

Last night in NYC, Blackstones held a party to celebrate the expansion of their East Village outpost with Paul Sevigny on the decks, Katy Perry and John Mayer stepped out together for the Friars Foundation Gala honoring Don Rickles, Prabal Gurung, Olivier Theyskens, and Hanne Gaby Odiele came out to support Jacquelyn Jablonski at her Autism Speaks event, and so much more!