Fashion Looks of the Week 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 November 1, 2013 @ 11:51AM Pin Share Tweet Email Trending Videos Photo: Tony DiMaio/startraksphoto.com Looks of the Week 01 of 22 Gemma Arterton Richard Young/startraksphoto.com WHAT SHE WORE At the UNICEF Halloween Ball, Gemma Arterton opted out of a costume and instead went for a lingerie-inspired lace-trimmed floral print Louis Vuitton dress, pairing it with the brand's accessories and dramatic eye makeup. 02 of 22 Maria Menounos Cliffe Fraser / Splash News WHAT SHE WORE Menounos stepped out in a winter-white Marchesa gown with organza flowers embellished at the shoulders. Light purple chalcedony teardrop earrings served as the finishing touch. 03 of 22 Naomi Watts Ben Gabbe/FilmMagic WHAT SHE WORE At the New York premiere of Diana, Naomi Watts looked royally good in an indigo cut-out Michael Kors gown with optic white embroidery, glamming it up with a scarlet-red Roger Vivier clutch and Harry Winston diamonds. 04 of 22 Jamie Chung Gregory Pace/BEImages WHAT SHE WORE Chung nailed the monochromatic look in a white strapless plunging top and tapered pants, matching her outfit a studded white Rebecca Minkoff clutch, black strappy heels, a gold bracelet and Marti Zoe midi rings. 05 of 22 Princess Charlene of Monaco Dimitrios Kambouris/Getty Images for Princess Grace Foundation WHAT SHE WORE At the 2013 Princess Grace Awards Gala, Princess Charlene of Monaco was statuesque in a dramatic high-neck Ralph Lauren floor-grazing gown. Save for a diamond bracelet, all other accessories were kept to a minimum. 06 of 22 Jessica Alba Donato Sardella/WireImage WHAT SHE WORE Alba struck a pose at the Kenzo Kalifornia launch event in the brand's black-and-white botanical-inspired printed mini dress, styling it with black tights, black accessories and Lia Sophia rings. 07 of 22 Blake Lively Dominique Charriau/WireImage WHAT SHE WORE As the newest face of L'Oreal Paris, Blake Lively chose French brand Balmain for the announcement, wearing an off-the-shoulder pale boucle houndstooth flared dress with a chain-lined silver belt. Her shoe of choice: nude pumps. 08 of 22 Diane Kruger AFP PHOTO / Miguel SCHINCARIOLMiguel Schincariol/AFP/Getty Images WHAT SHE WORE At Chanel's Little Black Jacket event in Brazil, Kruger fittingly chose a red-belted strapless Chanel Couture dress with floral appliques, simply styling it with strappy Stuart Weitzman sandals. 09 of 22 Olivia Wilde Amanda Edwards/WireImage WHAT SHE WORE Mom-to-be Wilde went for a ladylike look, accessorizing a pretty floral-print peplum Cushnie et Ochs dress with a skinny cuff, a gray clutch and two-toned dark green Jimmy Choo pumps. 10 of 22 Zoe Saldana Jason LaVeris/FilmMagic WHAT SHE WORE With the exception of black pumps, EF Collection earrings and Rona Pfeiffer ring, Saldana pared down on all other accessories, letting her blue plunging asymmetric Chloe dress do all the work. 11 of 22 Coco Rocha Neil Rasmus/BFAnyc/Sipa USA WHAT SHE WORE Rocha did menswear right, topping off her speckled blouse and dark skinnies with a shimmery metallic tuxedo blazer and black pumps. 12 of 22 Hailee Steinfeld REUTERS /MARIO ANZUONI /LANDOV WHAT SHE WORE At the Los Angeles premiere of Ender's Game, Hailee Steinfeld went the playful route in head-to-toe Saint Laurent: A one-shoulder sequined red lip print, black ankle-grazing pants and black pumps. Her accessory of choice-a gold plated W. Britt block bracelet with onyx stones. 13 of 22 Kate Bosworth Marion Curtis/Startraksphoto.com WHAT SHE WORE Bosworth epitomized elegance in a black drape Christopher Kane number that was embellished at the neckline and at the waist. She accessorized with Ana Khouri jewelry and black Casadei pumps. 14 of 22 Camilla Belle Daniel Robertson/startraksphoto.com WHAT SHE WORE At the A Quest for Beauty: The Art of Van Cleef & Arpels event, Camilla Belle debuted a new set of bangs in an aqua silk faille floral-embroidered fit-and-flared Oscar de la Renta frock, gold peep-toes and Van Cleef & Arpels jewels. 15 of 22 Abigail Breslin Jordan Strauss/Invision/AP WHAT SHE WORE Breslin glammed up for the Los Angeles premiere of Ender's Game, selecting a black sheer yoke Halston Heritage gown with embellished sleeves. She added a pop of color with green drop earrings. 16 of 22 Elle Fanning Aleks Kocev /BFAnyc/Sipa USA WHAT SHE WORE Fanning dared to stand out in a revealing Rodarte dress that featured a metallic-trimmed dark green top with an exaggerated keyhole opening and a black sheer maxi skirt. She accessorized with Rona Pfeiffer rings. 17 of 22 Natalie Portman Future-Image/ZUMAPRESS.com WHAT SHE WORE Portman premiered Thor: The Dark Kingdom in Berlin in a white strapless Christian Dior Couture ball gown with a black waistband, complementing the dress with a black Dior clutch and Dior Fine jewelry. 18 of 22 Jennifer Hudson Ricky Fitchett/ZUMAPRESS.com WHAT SHE WORE Hudson showed off her new pixie cut in a jacquard long-sleeve Balmain LBD, adding drama with knee-high Christian Louboutin lace-up boots and some statement rings. 19 of 22 Jessica Pare Stefanie Keenan/Getty Images for PANDORA Jewelry WHAT SHE WORE Pare struck a pose in L'Wren Scott: a black silk blouse and a metallic bordeaux pencil skirt. Drop earrings and strappy heels were the finishing touches. 20 of 22 Sophia Bush Fernando Lucena/startraksphoto.com WHAT SHE WORE At the Third Annual Pencils of Promise Awards, Sophia Bush shined on the red carpet in a long-sleeve Escada gown that was hand-embroidered with gray beading to create a metallic mesh effect. She piled on the luminosity with a graphite belt and a gold Chanel clutch. 21 of 22 Kate Bosworth Bryan Bedder/Getty Images for Lucky Magazine WHAT SHE WORE Bosworth modeled her latest collection from Topshop: A white leather sweatshirt, an asymmetric foil wrapped skirt and white leather booties. 22 of 22 Diane Kruger Tony DiMaio/startraksphoto.com WHAT SHE WORE At the Autism Speaks' Third Annual Blue Jean Ball, Kruger styled her pale-pink pearl-studded Emilia Wickstead tuxedo mini dress with a blue Autism Speaks pin, red satin pumps and a Perspex Charlotte Olympia boxed clutch.