Our PicksBest & Worst Dressed of the WeekThe Fashion Beast Team05.23.14Our PicksBest & Worst Dressed of the WeekDiane 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.The Fashion Beast Team05.23.14 9:45 AM ETGetty (4) 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. Mike Marsland/GettyBest Dressed: Lara StoneModel Lara Stone stunned in a minimalist, vibrant pink Calvin Klein Collection dress for the premiere of The Search on May 21 in Cannes. Tim P. Whitby/GettyBest Dressed: Marion CotillardMarion 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. Slaven Vlasic/GettyBest Dressed: Diane KrugerThe 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. Michael Buckner/GettyBest Dressed: Cara DelevingneSupermodel 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. ROBYN BECK/GettyBest Dressed: Kendall and Kylie JennerThe 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. Michael Buckner/GettyBest Dressed: Suki WaterhouseAlthough 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. Jacopo Raule/GettyWorst Dressed: Kylie MinogueAlthough 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. Frazer Harrison/GettyWorst Dressed: Natasha BedingfieldOn 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.