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InStyle's editorial guidelines Updated on July 11, 2014 @ 03:50PM Pin Share Tweet Email Photo: Rex/REX USA Looks of the Week 01 of 22 Cameron Diaz Broadimage Newswire Cameron Diaz was spotted looking effortless at the red carpet Los Angeles premiere of Sex Tape, choosing to into a sheer polka dot Stella McCartney jumpsuit for the occasion. She styled her look with spiked Melinda Maria drop earrings, a gold cuff, and T-strap Prada sandals. 02 of 22 Jennifer Lopez Dennis Van Tine / ABACAUSA Jennifer Lopez showed off her flirty side at the Los Jets screening in a pretty pale pink Zuhair Murad Couture design, featuring a floral embroidered applique silk blouse with a silk peplum pencil skirt. Drop earrings and pink floral print Bionda Castana pumps rounded out her ladylike (yet, still sexy!) ensemble. 03 of 22 Jamie Chung Cindy Ord/Getty Images Jamie Chung was all smiles at the Birchbox flagship store opening in a cut-out Three Floor dress with criss-cross straps and zippered detailing. No other accessories except for her black Stuart Weitzman sandals completed her look. 04 of 22 Hilary Swank Andreas Rentz/Getty Images Hilary Swank sat front row at the Marc Cain spring/summer 2015 show in a playful black-and-white polka-dot full skirt from the Marc Cain collection. She styled it with a bold persimmon blouse and black patent pumps. 05 of 22 Emma Watson KCS Presse / Splash News Emma Watson toughened up her sexy lacy black Valentino separates at the Valentino Couture fall/winter 2014 show with a black moto jacket and a solo Delfina Delettrez pearl-ended earring. A miniature M2Malletier top-handle clutch, Anita Ko rings, and red pumps completed her look. 06 of 22 Kate Winslet Jerome Domine/ABACAPRESS Kate Winslet worked her curves at the Lancome Nouvelle Vague party at Paris Haute Couture Fashion Week in a cut-out violet skin-skimming dress, complete with Ana Khouri jewelry, and black clutch, and killer heels. 07 of 22 Olivia Palermo AKM-GSI Olivia Palermo gave her color-blocked Valentino frock a playful spin with fringed forest green Valentino clutch and printed Sergio Rossi sandals. AKM-GSI July 9, 2014**USA ONLY** To License These Photos, Please Contact :Steve Ginsburg(310) 505-8447(323) email@example.com@akmgsi.comorMaria Buda(917) firstname.lastname@example.org@gmail.com 08 of 22 Jessica Alba Bauer-Griffin/GC Images Jessica Alba was polished to perfection-she effortlessly styled her white top with a cream shawl collar Max Mara blazer and plum wool Julia Korol trousers. Aviators, an EF Collection necklace, a color-blocked carryall, and nude Monique Lhuillier lace-up sandals served as her accessories. 09 of 22 Nina Dobrev Rindoff/Le Segretain/French Select/Getty Images Nina Dobrev tapped her darker side at the Bulgari event during Paris Haute Couture Fashion Week with a black belted sleeveless Elie Saab gown printed with graphic, moody florals. A set of diamond danglers, a single bracelet, and a black clutch rounded out her look. 10 of 22 Chloe Grace Moretz FameFlynet Chloe Grace Moretz glittered from the front row at the Armani Prive fall/winter 2014 show in an embellished gray halter and gunmetal textured shorts, both by Giorgio Armani, and sparkly sandals. 11 of 22 Kate Hudson Stephane Cardinale/People Avenue/Corbis Kate Hudson basked in the spotlight at the Armani Prive fall/winter 2014 show in a sparkle-studded violet Armani Prive creation (complete with a paisley-print fabric boutonniere), styling it with a relaxed topknot and a simple black clutch. 12 of 22 Halle Berry Santi/Splash News Halle Berry took on a unique LWD for the summer-hers boast drapery, mesh detailing, and an asymmetric hem. She accessorized with aviators, a cool armor ring, and taupe Henri Lepore Dezert pumps. 13 of 22 Olivia Palermo FameFlynet As the queen of high-low fashion, Olivia Palermo dug out her black-and-white speckled Banana Republic trousers for the Elie Saab Couture fall/winter 2014 show, elevating them with a printed top, a black blazer, and lace-up sandals. 14 of 22 Charlize Theron Rindoff/Dufour/French Select/Getty Charlize Theron sat front row at the Dior Couture show at Paris Haute Couture Fashion Week in a gold embroidered silk cady Dior dress, letting it revel in the spotlight with muted accessories, like her Anita Ko diamond ear jackets and nude Dior sandals. 15 of 22 Diane Kruger Steve Granitz/WireImage Diane Kruger hit The Bridge season two premiere in a colorful embroidered Mary Katrantzou shift dress, complete with a see-through Charlotte Olympia clutch and Stuart Weitzman sandals. 16 of 22 Halle Berry HP/Starlitepics/ABACAPRESS.COM Halle Berry wowed at her appearance on the Late Show with David Letterman in a metallic plum Atelier Versace dress with vertical openwork detailing, accessorizing with jewelry by Jack Vartanian, Sutra, Antonini, and Borgioni, and black Ruthie Davis pumps. 17 of 22 Lily Collins Pascal Le Segretain/Getty Lily Collins went head-to-toe Chanel at the Chanel Couture fall/winter 2014 show, elevating a printed knit with a red-and-silver metallic sequined pencil skirt, a maroon fringed bag, and striped pumps. H. Stern rings completed her look. 18 of 22 Emma Watson Pierre Suu/GC Images/Getty Emma Watson switched out of her couture and into something slightly more casual for the Dior private dinner, pairing her floral print Dior mini with a navy Dior top. Anita Ko earrings, a black clutch and blue strappy Roger Vivier pumps rounded out her look. 19 of 22 Jennifer Lopez AKM-GSI Stunning! Jennifer Lopez dropped jaws at the Atelier Versace fall/winter 2014 show in a white strapless Atelier Versace gown with a thigh-high slit that revealed one beaded pant leg. Atelier Versace jewelry and silver Versace platform sandals served as the finishing touches. 20 of 22 Freida Pinto Pierre Suu/GC Images/Getty Freida Pinto hit the Miu Miu resort 2015 show in a navy belted Miu Miu dress speckled all over with grommets and metallic embellishments. Dark Miu Miu accessories completed her look. 21 of 22 Miranda Kerr Santi/Splash News Miranda Kerr stepped out in a blue-and-white maxi dress with sheer sleeves and subtle cut-outs near the shoulders, effortlessly styling it with aviators, a black Hermes carryall and cobalt blue flat sandals. 22 of 22 Kate Beckinsale Rex/REX USA Kate Beckinsale was one stylish spectator at Wimbledon 2014 in breezy, summery white separates-a crop top and a full midi skirt. She gave her summer whites a dash of color with W. Britt studs, a color-blocked Edie Parker clutch, and fuchsia pumps.