Celebrity Fashion Trends By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on September 13, 2007 @ 04:13PM Pin Share Tweet Email Trending Videos Photo: Frazer Harrison/Getty Fashion Trends 01 of 15 Cocktails, Anyone? Kevork Djansezian/AP Reese Witherspoon in a vintage Chanel dress and Chanel jewelry. 02 of 15 Cocktails, Anyone? Steve Granitz/WireImage Charlize Theron showed miles of leg in a sheer black John Galliano for Dior dress. 03 of 15 Cocktails, Anyone? Kevork Djansezian/AP Natalie Portman didn't need a lot to show off her black lace vintage Chanel dress. A chunky ring and black strappy heels were her only accessories. 04 of 15 Cocktails, Anyone? Mark J. Terrill/AP Brokeback Mountain' s Anne Hathaway glittered in a navy tulle Marc Jacobs dress. 05 of 15 Sexy Backs Kevork Djansezian/AP Penélope Cruz let her back steal the show in a pale backless gown. 06 of 15 Sexy Backs Kevork Djansezian/AP Hilary Swank repeated her backless appearance at the 2005 Oscars with this strappy, low-cut dress by Jean Yu. 07 of 15 Sexy Backs Kevork Djansezian/AP Teri Hatcher took a backless turn in a bronze metallic Versace dress. 08 of 15 Sexy Backs Steve Granitz/WireImage A gorgeous Jessica Alba, also in Versace, bared her back but showed off the gown's train on the red carpet. 09 of 15 Get Backs Frazer Harrison/Getty Eva Longoria matched the carpet as she modeled her bright red dress by Bob Mackie. 10 of 15 White Nights Mark J. Terrill/AP Pride amp Prejudice' s Keira Knightley, nominated for a Globe, walked the red carpet in a white vintage Valentino gown with a jeweled waist sash. 11 of 15 White Nights Mark J. Terrill/AP Best Actress nominee (and then-expectant mother) Gwyneth Paltrow showed off her creamy Empire-waist Balenciaga gown. 12 of 15 White Nights Mark J. Terrill/AP Best Dramatic Actress winner Felicity Huffman chose a white Empire-waist gown with silver straps by Marchesa. 13 of 15 White Nights Mark J. Terrill/AP A History of Violence' s Maria Bello was also in a white Empire-waist gown-hers by Hollywood favorite Elie Saab. 14 of 15 White Nights Kevin Winter/Getty The radiant Kate Beckinsale arrived in a vintage white lace gown with a fishtail hem by Christian Dior. 15 of 15 White Nights Frazer Harrison/Getty Grey's Anatomy' s Ellen Pompeo shimmered in a belted white satin gown with a lace bodice.