Celebrity Fashion at the Elle's 20th Annual Women in Hollywood Celebration

Marion Cottilard, Lea Michele, Emmy Rossum, Reese Witherspoon, Naya Rivera and other celebrities attend Elle's 20th Annual Woman in Hollywood Celebration.

Actress and mother of three Reese Witherspoon opted for a minimalistic Calvin Klein strapless dress which hugged her curves. Paired with her sultry red and cream look were Manolo Blahnik ankle strap heels and David Yurman and Harry Winston jewellery.

Shailene Woodley was honoured with the Calvin Klein Collection Emerging Star Spotlight Award, and the young star wore a Calvin Klein Spring 2014 design. Her look consisted of a geometric printed tunic dress with cut-out details. Styled with the chic neutral dress were black shoes and a pink lip.

Lake Bell covered up in an Altuzarra Fall 2013 twill dress featuring a black crepe draped bodice and exposed zip detail. Paired with her modern look were Gianvito Rossi pumps and a black metal mesh clutch.

Naya Rivera showed off ample cleavage in a Pamella Roland Spring 2014 white jumpsuit. The dress featured a bold v-neckline with mesh sleeves, and the newly engaged 'Glee' star paired it with  a black Jimmy Choo clutch, a statement necklace, and pointy black pumps.

Lea Michele appeared too skinny, perhaps over the death of her boyfriend, nevertheless looked pretty in a neutral hues strapless dress from the Calvin Klein Spring 2014 collection. The dress featured cut-outs and multi-colour thread work, and the 'Glee' star paired it with Brian Atwood 'Lebrea' strappy sandals and a Kotur beige clutch.

Emmy Rossum wore an Elie Saab Resort 2014 creation, and looked stunning. The halter neck cocktail dress was embellished and paired with a satin clutch and matching Louboutins. Silver jewellery completed Emmy's look for the event.

Marion Cotillard being the face of Dior, wore a Dior Spring 2014 creation. The strapless silver dress featured a jacquard floral embroidery, and had a nipped-in waist and cocoon back. Paired with the look were tri-colour Dior sandals, a knotted hairdo, and a barely there make up look.