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 December 20, 2013 @ 11:40AM Pin Share Tweet Email Trending Videos Photo: FameFlynet, Inc Looks of the Week 01 of 22 Lea Seydoux Audrey Poree/ABACAPRESS. COM WHAT SHE WORE Seydoux posed in a Louis Vuitton ensemble, pairing a navy-and-white striped long-sleeve shift with a diagonally striped short-sleeved coat with frayed edges. She matched her strappy heels and clutch with her red lip. 02 of 22 Sandra Bullock Franziska Krug/Getty Images WHAT SHE WORE Bullock opted for a sexy leather Asos pencil skirt that she paired with a buttoned top and strappy heels for an all-over black look. 03 of 22 Blake Lively Jacopo Raule/Getty Images WHAT SHE WORE Lively made an entrance at the Gucci spring/summer 2014 show in Milan. She wore a butterscotch belted dress with crossover detailing, a nude clutch and bronze metallic heels, all by the brand, that she accented with a stack of gold bracelets. 04 of 22 Julianne Moore SartorialPhoto / Splash News WHAT SHE WORE At the Don Jon premiere, Julianne Moore stunned in a sheer and embroidered black Jason Wu column. She kept everything else to a minimum except for a gold Fred Leighton bangle. 05 of 22 Kerry Washington Gregorio T. Binuya/Everett Collection WHAT SHE WORE Washington walked the carpet for the ABC upfronts in a red leather Marc by Marc Jacobs sheath and black and gold accessories, including vintage House of Lavande studs. 06 of 22 Rooney Mara All Access Photo/Splash News WHAT SHE WORE Mara hit up the premiere of Her at the 8th Rome Film Festival in a white strapless Balenciaga mini with a sheer cape-like overlay. For shoes, she stayed in the same palette, stepping out in white leather strappy B Brian Atwood sandals. 07 of 22 Olivia Wilde AFF-USA.COM WHAT SHE WORE At the ESPY Awards, Olivia Wilde bared her midriff in a two-piece A.L.C. design: a leather crop top and a red checkered midi skirt. A Rona Pfeiffer skinny cuff, gray clutch and black strappy Jerome C. Rousseau heels completed her look. 08 of 22 Jennifer Lawrence Eric Charbonneau/Invision for Lionsgate/AP WHAT SHE WORE At The Hunger Games: Catching Fire premiere, Jennifer Lawrence dropped jaws in a belted sheer two-tone gray knitted Christian Dior Couture gown that she styled with Anita Ko jewelry and a black Roger Vivier box clutch. 09 of 22 Lily Collins Andreas Rentz/Getty Images for Constantin Film WHAT SHE WORE At the Mortal Instruments: City of Bones premiere in Germany, Lily Collins accessorized her black sleeveless Paper London crop top and black floor-length Halston Heritage tulip skirt with a chunky gold chain necklace and gold Movado cuff watch. 10 of 22 Shailene Woodley Johns PKI / Splash News WHAT SHE WORE Woodley bared her midriff in a black neoprene crop to and a kaleidoscope printed silk and beaded fringe skirt, both by Emilio Pucci. She kept everything else to a minimum, with a black Chad Ypon cuff and black suede-mesh Casadei pumps. 11 of 22 Jessica Biel David Tingey/Sipa USA WHAT SHE WORE At the world premiere of Runner Runner, Jessica Biel opted for a double-breasted tailored Dolce & Gabbana suit that she styled with an ivory blouse, Martin Katz jewelry, Mark Cross box bag and black ankle-strap pumps. 12 of 22 Nicole Richie All Access Photo/Splash News WHAT SHE WORE Also at the gala, Richie took to the midriff-baring trend with a bold Alberta Ferretti ensemble that comprised a flower-adorned crop top and a multicolored stripe maxi skirt, accessorizing with a smattering of rings and a black clutch. 13 of 22 Emma Stone JB Lacroix/WireImage WHAT SHE WORE Emma Stone hit The Amazing Spider-Man 2 photocall in a Band of Outsiders suit and bright red pumps. Tousled locks, Oliver Peoples shades, and a Dana Rebecca Designs ring finished the look. 14 of 22 Diane Kruger Rob Latour/Splash News WHAT SHE WORE Diane Kruger signed copies of The Host in chic skin-baring separates: a collared button-up crop top by Carven and a leather pencil skirt by Parisian designer Vanessa Bruno. She completed the look with gray strappy pumps by Christian Louboutin. 15 of 22 Olivia Wilde Jon Furniss Photography/Invision/AP WHAT SHE WORE Wilde showed off her décolletage in a stunning black Gucci tuxedo, opting to pair her stunning look with nothing except for black pumps. 16 of 22 Dianna Agron AKM-GSI WHAT SHE WORE Snapped in Paris, France, Dianna Agron offset her pretty paisley-print dress with a blue ombre-embellished plaid Louis Vuitton overcoat. The finishing touch? Two-tone stacked pumps. 17 of 22 Allison Williams Jon Kopaloff/FilmMagic WHAT SHE WORE Williams attended a breakfast celebrating women in entertainment in a nude leather-and-cashmere dress and black leather sandals, both by Calvin Klein Collection. A set of danglers completed her look. 18 of 22 Catherine Middleton Daniel Deme/WENN.com WHAT SHE WORE Middleton rode the tube in an embellished By Malene Birger coat, bowed hat, black clutch and suede pumps. 19 of 22 Gwyneth Paltrow Sara De Boer/startraksphoto.com WHAT SHE WORE Gwyneth Paltrow hit the Iron Man 3 premiere in a navy, teal, and silverAntonio Berardi gown. 20 of 22 Rihanna CBS/Eric McCandless /Landov WHAT SHE WORE Rihanna brought the fire to the Grammys in a red Azzedine Alaia gown and Neil Lane diamonds. 21 of 22 Miley Cyrus Jeffrey Mayer/WireImage WHAT SHE WORE At the 2013 AMAs, Miley Cyrus donned a slightly more conservative look, opting for a white Versus Versace suit with oversized gold safety pins along each side, and black pumps. 22 of 22 Olga Kurylenko FameFlynet, Inc WHAT SHE WORE Kurylenko stepped out in Vienna wearing a chic black ensemble, including a ruffled topper.