40 Years of Calvin Klein

The art and entertainment worlds came together to fete the iconic American fashion house’s 40th anniversary. The one-of-a-kind event was held in a space that hasn’t been open to the public in decades-on an elevated railroad structure in the West 30s-known as the High Line, which will soon become a park for New Yorkers. "It's a very chic, unpretentious way to celebrate the evening," said Secret Obsession face Eva Mendes, who wore a dress by Calvin Klein designer Francisco Costa. "Being part of such an iconic brand is a dream."

-With reporting by Polly Blitzer

Naomi Watts

owes more to Calvin Klein than simply a few stunning red-carpet looks-the actress was wearing a Francisco Costa design when she first met boyfriend Liev Schreiber. "I'm sure the dress played a part [in the romance]. It was very feminine, but like all of his designs, the lines very were clean and sharp."

Beautiful Halle Berry celebrated Calvin Klein-not to mention her model partner, Gabriel Aubry-in a slinky design from the line.

What comes between Brooke Shields and her Calvin Klein jeans? If her wardrobe at the anniversary party is to be believed, still not a thing. The Lipstick Jungle star celebrated in a suit jacket by Calvin Klein designer Francisco Costa and a pair of skinnies. "I think of my Calvin moments every day, but in a good way," said Shields.

NewlywedJoy Bryant wore a shimmering silver top with a luxe leather skirt for the event. Guests like Bryant roamed a multi-level minimalist structure designed by famed architect John Pawson.

Grey's Anatomy

beauty Ellen Pompeo looked simply stunning in a black sheath worn with T-strap sandals. Pompeo and the celebrity crowd got down to beats representing all four of CK's decades, spun by DJ Paul Sevigny.

Rosario Dawson

passed up CK for DVF, in a graphic-print Diane von Furstenberg dress. That's not to say that the actress doesn't admire Calvin Klein design: "That classic, clean look of jeans and beautiful white dresses-the consistency is actually a strength because it's such a classy and elegant line."

Claire Danes

set off her golden tan with a platinum single-shoulder dress. Matching slingbacks completed the ensemble.

Gossip Girl

beauty Jessica Szohr showed off her shape in a two-tone bandage dress and matching shoes.

Lipstick Jungle

actress Lindsay Price slipped into a little white dress-from the Calvin Klein Collection-for the luxurious affair, which was held on a 6.7 acre grand promenade.

Las Vegas

lead Molly Sims dressed down a formfitting strapless sheath with loose locks and a beaded necklace.

Fashion Week MVP Leighton Meester stunned in a metallic leather skirt and sheer top.