While the hard-partying set may currently be immersed in a sea of #FoamAndDiamonds in Ibitha, this week brought plenty of revelry on this side of the Atlantic, too. Stateside partygoers headed out West for two momentous, multiple-day affairs: In Colorado, Stefano Tonchi co-hosted the Aspen Art Museum’s ArtCrush gala, which drew everyone from Mamie Gummer to Richard Phillips to Lorna Simpson. Meanwhile, in Chicago, Mia Moretti and Cleo Wade sported bandana tops and joined Malia Obama and Joe Jonas at Lollapalooza. In the Hamptons, Claude Wasserstein hosted a swanky Ralph Rucci trunk show at her home (featuring models Anna Cleveland and Audra Callo), while Kelly Rutherford brought her two well- dressed kids to the Free Arts NYC Kidsfest. Back in New York, Haim and Sleigh Bells performed at the Live in Levi’s launch in Brooklyn Bridge Park, and Audrey Gelman, Julianne Hough, and Marissa Webb all turned out to celebrate Roland Mouret’s new collection for Banana Republic. Click through the slideshow for these and more highlights from this week’s parties.