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InStyle's editorial guidelines Updated on March 24, 2015 @ 02:53PM Pin Share Tweet Email Photo: Lionel Hahn/Abaca/startraksphoto.com 5/24 A-List 01 of 22 Olivia Palermo WHAT SHE WORE Olivia Palermo showed some skin in a leopard print Roberto Cavalli gown, woven bracelet and tribal sandals at the amfAR Cinema Against AIDS Gala. WHY WE LOVE IT Sombody took a walk on the wild side! The stylish star was at her most fierce in a sexy skin-baring design. 02 of 22 Rosie Huntington-Whiteley David Fisher/Rex/Rex USA WHAT SHE WORE Huntington-Whiteley paired Christian Dior's silk bustier and skirt with white Christian Louboutin stilettos in Cannes. 03 of 22 Jessica Chastain WENN.com WHAT SHE WORE At the Cannes All Is Lost premiere, Chastain took the spotlight in a vibrant jeweled gown and ankle-strap sandals. 04 of 22 Nicole Kidman INFphoto.com WHAT SHE WORE Kidman arrived for the Cannes premiere of Nebraska in a floral Valentino Haute Couture gown and sparkling drop earrings. 05 of 22 Marion Cotillard Lionel Hahn/ABACAPRESS. COM WHAT SHE WORE At a Cannes press event for The Immigrant, Cotillard greeted fans in an embellished Alexander McQueen LWD and sparkling Louboutins. 06 of 22 Jessica Chastain Pascal Le Segretain/Getty Images WHAT SHE WORE Jessica Chastain looked regal in her long-sleeve Versace Collection gown and sapphire Bulgari jewels at the Cannes Cleopatra premiere. WHY WE LOVE IT The elegant star took a page from Elizabeth Taylor's book in a glamorous design that showcased her jewels. 07 of 22 Rosario Dawson George Pimentel/WireImage WHAT SHE WORE In Cannes, Dawson glowed in a sequin Marchesa gown that she paired with an ornate cuff and woven clutch. 08 of 22 Marion Cotillard WENN.com WHAT SHE WORE Marion Cotillard made an entrance at the Cannes Blood Ties premiere in a silk bustier Christian Dior dress, the label's ankle-strap heels and jewels from Chopard's green carpet collection. WHY WE LOVE IT Tres chic! The French actress did her homeland proud in an elegant pairing. 09 of 22 Zoe Saldana Splash News and Pictures WHAT SHE WORE Saldana romanced us in a floral Valentino gown at the Cannes premiere of Blood Ties. Pearl, garnet and diamond David Yurman jewelery, pave Jamie Wolf earrings and a pyramid Melinda Maria ring completed the look. 10 of 22 Jessica Biel George Pimentel/WireImage WHAT SHE WORE Jessica Biel was at her loveliest in a plumed Marchesa design that she paired with the label's crystal-embroidered clutch, nude pumps and a serpentine necklace at the Cannes premiere of Inside Llewyn Davis. WHY WE LOVE IT Exotic elements like feathers and snakes gave an enticing twist to the actress's pretty style. 11 of 22 Emma Watson Doug Peters/PA Photos/ABACAPRESS. COM WHAT SHE WORE Watson attended the Cannes premiere of The Bling Ring in a black and white Chanel Couture column and edgy Repossi ear cuff. 12 of 22 Naomi Watts Mike Marsland/WireImage WHAT SHE WORE Watts hit a Cannes bash in a floral Dolce & Gabbana cocktail dress, gold Aurélie Bidermann danglers, an oversized watch and strappy sandals. 13 of 22 Berenice Bejo Dominique Charriau/WireImage WHAT SHE WORE Bejo greeted fans at a Le Passe press event wearing Louis Vuitton's bright blue design and cap-toe heels. 14 of 22 Freida Pinto Phil Loftus/Capital Pictures/Sipa USA WHAT SHE WORE Freida Pinto sparkled on the Cannes red carpet in an embroidered column, pearl Daniel Swarovski box clutch and strappy sandals. WHY WE LOVE IT Va-va-va-voom! A sexy slit and scarlet lips gave this look a retro, smoldering appeal. 15 of 22 Carey Mulligan Mike Marsland/WireImage WHAT SHE WORE Mulligan stepped out for a Cannes Calvin Klein bash in the label's strapless LBD and ankle-strap Brian Atwood platforms. 16 of 22 Jessica Chastain Dominique Charriau/amfAR13/Getty Images WHAT SHE WORE Chastain looked red hot in a peek-a-boo Saint Laurent gown that she accessorized with a serpentine Bulgari bracelet at the amfAR Cinema Against AIDS gala. 17 of 22 Nicole Kidman Splash News and Pictures WHAT SHE WORE The actress set off her embroidered Dior Haute Couture design with the label's fluorescent pumps at the Cannes Film Festival opening ceremony. WHY WE LOVE IT Neon's never looked so sophisticated as it did on Nicole Kidman! 18 of 22 Freida Pinto Joel Ryan/Invision/AP WHAT SHE WORE Pinto was at her brightest in a billowy shift and patent leather stilettos in Cannes. 19 of 22 Isla Fisher Sipa USA WHAT SHE WORE Fisher was red hot in Oscar de la Renta's tiered gown and a deco necklace at the Cannes Film Festival opening ceremony premiere of The Great Gatsby. 20 of 22 Freida Pinto Mike Marsland/WireImage WHAT SHE WORE At Cannes, Pinto lit up the red carpet in a hot pink Gucci gown and yellow gold jewelry from Chopard. 21 of 22 Julianne Moore Matt Baron/BEImages WHAT SHE WORE Moore made an entrance at the Cannes Film Festival in a purple lame Dior Haute Couture evening dress, diamond Chopard jewels and strappy metallic sandals. 22 of 22 Emma Watson Lionel Hahn/Abaca/startraksphoto.com WHAT SHE WORE Watson greeted fans at Cannes in an aubergine Christopher Kane design and pointy-toe Gianvito Rossi pumps.