This week, Anna Wintour, Monica Lewinsky, and Martha Stewart all partied together at Hollywood Reporter’s celebration of its annual list of the 35 Most Powerful People in Media, where they were joined by everyone from Ronan Farrow and Savannah Guthrie to Crystal Renn. Back in New York, Barneys threw an intimate dinner in honor of Isabel Marant, where guests included Inez and Vinoodh and Mamie Gummer, and Cathy Horyn and Betty Halbreich turned out to celebrate the launch of Bergdorf Goodman’s new cookbook. Meanwhile, the CFDA and Bloomingdale’s partied with Jeff Koons and Lucy Chadwick in honor of the new book, Designers on Instagram, and Sigourney Weaver and Lexi Boling stopped by the after-party for the Dior and I premiere. Click through the slideshow for these and more highlights from the week’s biggest parties, including two Mishas (Barton and Nonoo), Lake Bell, Scott Eastwood, and more.