With the weather warming up in New York City this week, everyone was out and about. There were a few musical surprises at parties, including a performance by Lion Babe at the celebration for Fendi’s Thierry Lasry capsule collection — where everyone from the Brant brothers to Andreja Pejić showed up — to Tove Lo at Banana Republic’s flagship grand opening that Jamie Chung checked out. Models made sure not to skip out on any events: Bella Hadid and Hailey Baldwin checked out the New Museum’s Triennial Members Party, and Hanne Gaby Odiele supported Unemployed magazine’s launch. Plus, Bradley Cooper and Jennifer Lawrence were in town, celebrating the premiere of Serena. Meanwhile, in L.A., Katy Perry got together with BFF Mia Moretti and fans to screen The Prismatic World Tour. See all these and more party highlights in our slideshow ahead.