Who else could pack a front row with Kate Bosworth, Julianne Moore, Ashley Olsen, Rosario Dawson and more? Calvin Klein, of course! The stars turned out to see a typically minimalist collection from the house’s designer, Francisco Costa — and judging from the enthusiastic responses and clapping, they loved it. Rosario told PEOPLE that “I love the colors. I love the material of the dresses. Specifically, I really loved the architecture of the dresses. There were a lot of sort of panels on the top, things that made certain parts of the body more sheer than others, really long slits on the sides. But just like really simple, really cool things like that architecturally, I love that in clothes.” And we love seeing such a simply chic front row!