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From Marion Cotillard to Kendall and Kylie Jenner, The Best and Worst Dressed of the Week

Diane Kruger wore a feminine frock, Marion Cotillard donned a dress made from flea-market finds, and supermodels conquered Cannes. Plus, more best and worst dressed of the week.

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Kendall and Kylie took the Billboard Music Awards red carpet by storm, Marion Cotillard wore a Margiela dress crafted from flea-market finds, and supermodels conquered Cannes. Plus, more best and worst dressed of the week.

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Best Dressed: Lara Stone

Model Lara Stone stunned in a minimalist, vibrant pink Calvin Klein Collection dress for the premiere of The Search on May 21 in Cannes.

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Best Dressed: Marion Cotillard

Marion Cotillard took a fashion risk at the Two Days, One Night photocall on May 20 in Cannes, and it paid off. The actress looked youthful and very high-fashion in a high-necked, multi-colored minidress (crafted from items found at flea markets) from Maison Martin Margiela's Spring 2014 couture collection.

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Best Dressed: Diane Kruger

The red and cream, high-low Giambattista Valli frock Diane Kruger wore to the 73rd annual George Foster Peabody Awards on May 21 in NYC was both flattering and extremely feminine.

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Best Dressed: Cara Delevingne

Supermodel Cara Delevingne finally made her Cannes debut on May 21, walking the red carpet for the premiere of The Search in a gilded sequined minidress by Chanel with a black-and-white quilted clutch and ankle-strap heels, also by the designer. 

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Best Dressed: Kendall and Kylie Jenner

The Jenner sisters took the red carpet by storm at the Billboard Music Awards on May 18. Budding model Kendall opted for a revealing Olcay Gulsen jumpsuit with a white bodice and navy pants, while Kylie (and her turquoise hair) kept things simple in a lacy white number.

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Best Dressed: Suki Waterhouse

Although all of Suki Waterhouse's Cannes looks were knock-outs, her strapless, black-based floral dress by Peter Pilotto paired with white strappy sandals for the Relativity at 10 lunch on May 18 took the cake. 

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Worst Dressed: Kylie Minogue

Although she was celebrating designer Roberto Cavalli on May 21, singer Kylie Minogue looked out of place in a non-Cavalli silky lavender romper that closely resembled a pair of pajamas.

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Worst Dressed: Natasha Bedingfield

On the model, the white Valentino look with flower appliques looked cute and feminine. On Natasha Bedingfield, however, the sheer shirt paired with white trousers and studded pumps was all sorts of unflattering messiness at the Billboard Music Awards on May 18.