Leighton Meester, Kate Bosworth and More celebrate Chloe in Los Angeles

Andreas Branch/Patrick McMullan/Sipa

The new Chloe boutique in Los Angeles may be opening on Melrose Ave., but the celebration was so big, it had to be held at a Hollywood studio! Hosted by Kate Bosworth and Chloe Sevigny, both dressed in the French brand head-to-toe, the party brought out a bevy of celebs to Milk Studios on Thursday night, from Leighton Meester and beau Sebastian Stan to Molly Sims, Zoe Saldana, Jamie-Lynn Sigler, Rachel Zoe and Bosworth’s model/boyfriend, James Rousseau. And why all the love for Chloe? “They have a lot of statement pieces, whether it’s a bag, or a blazer, there’s always a bit of flare and edge to everything,” Sigler told PEOPLE.com, herself dressed in a black blazer with a beaded lapel. But the line’s cut out dresses were the hit of the evening, seen on Saldana, Sevigny, and Meester. But for Meester, the decision was all about taking advantage of the warmer West Coast. “I’ve been in a perpetual winter for like an entire year in New York, so I was like I don’t care what it is I’m going backless, I’m going pantless, we’re doing it tonight! ” the Gossip Girl star enthused. And for Chloe fans in always-sunny L.A., that kind of summer-ready style is clearly something worth celebrating. - Shruti Dhalwala