Party Pics From Chloe Sevigny's Earth Day Kiehl's Bash

Last week, Hollywood’s best and brightest showed up to the Santa Monica Kiehl’s outpost to celebrate the skincare company’s new products commemorating Earth. Former HBO stars Michael C. Hall and Chloë Sevigny designed limited-edition labels for Kiehl’s Rare Earth Deep Pore Cleansing Masque, with 100% of Kiehl’s net profits benefitting the Waterkeeper Alliance—a grassroots organization that protects and purifies community waterways. The products are not only amazingly effective (we love the masque and toner for oily summer skin), but the packaging is beautiful and a great gift idea for a birthday or summer party hostess. Speaking of parties, be sure to click through to see all the photos from the star-studded bash, including hosts Chloë Sevigny (who rocked an Imitation of Christ fringed vest over a vintage Lee jean jacket), and former Hills stars Kristen Cavallari and Stephanie Pratt (who was doing her best Chrissy from Three’s Company impression), and much, much more.