Report CardFrom Carey Mulligan to Rooney Mara, Best and Worst Dressed of the WeekMisty White Sidell05.17.13Report CardFrom Carey Mulligan to Rooney Mara, Best and Worst Dressed of the WeekFrom a sunny Audrey Tautou to a ruffled and magenta David Hasselhoff at the Cannes Film Festival, see fashion’s highs and lows of the week. Misty White Sidell05.17.13 8:45 AM ETJason LaVeris/FilmMagic, Charley Gallay/Getty Images, Samir Hussein/Getty Images, George Pimentel/FilmMagicFrom a sunny Audrey Tautou to a ruffled and magenta David Hasselhoff at the Cannes Film Festival, see fashion’s highs and lows of the week. George Pimentel/WireImageBest Dressed, Belle in Blush: Carey MulliganMulligan wore a blush tone Dior Haute Couture gown with handfuls of Tiffany & Co. diamonds to the Cannes opening ceremonies, which also served as a screening for her new film, The Great Gatsby. Samir Hussein/Getty ImagesBest Dressed, Prim in a Playsuit: Rooney MaraRooney Mara tried on Giambattista Valli's monochromatic suiting at an afterparty celebrating The Great Gatsby at Cannes. The draped one-piece complements the actress’s refined taste. Anna Webber/Getty ImagesBest Dressed, in an Organza Sack: Kerry Washington Wearing a mauve Lanvin dress to a dinner party celebrating her new Elle cover, Kerry Washington effectively pulled off a look that most girls cannot: a giant organza sack. The ensemble also stood up next to supermodel Iman’s sleek white suit—a true feat. Pascal Le Segretain/Getty Images,Pascal Le SegretainBest Dressed, Living Doll: Nicole KidmanNicole Kidman’s doll-like, perfectly molded veneer may be a turnoff to some, but you can’t fault the actress for looking pretty flawless in this Dior Haute Couture electric floral dress, which she wore on opening night at Cannes. Pascal Le Segretain/Getty ImagesBest Dressed, Nose Ring: Sonam KapoorThe Indian actress went the heritage route at The Great Gatsby’s Cannes premiere on Wednesday in an updated sari and oversize nose ring. Pascal Le Segretain/Getty ImagesBest Dressed, Simply Effortless: Sofia CoppolaCoppola enlisted her signature for simplicity, as well as the help of close friend Marc Jacobs, in choosing this Louis Vuitton dress, worn to the Cannes premiere of her new film, The Bling Ring. George Pimentel/FilmMagicBest Dressed, Sundress Splendor: Audrey TautouTautou, like Coppola, decided that less is more when choosing this printed sundress by Valentino Red for a Cannes photo call. Charley Gallay/Getty ImagesBest Dressed, Midriff Gold Medal: Diane KrugerAvid aesthete Diane Kruger brought her abdomen A-game to a Vogue and M.A.C dinner celebrating designer Prabal Gurung on Monday. Kruger paired a black crop top with printed pants by the popular young designer. Dave J Hogan/Getty ImagesWorst Dressed, Flaming Ruffles: David HasselhoffTo his credit, David Hasselholf has never really been praised as a style icon. However, that does not excuse the magenta ruffled tuxedo shirt that he wore to the Cannes premiere of Jeune et Jolie on Thursday. Jason LaVeris/FilmMagicWorst Dressed, Picnic Table: Chloe MoretzChloe Moretz looked like a baby-shower picnic table in a dress by Chloe Sevigny for Opening Ceremony that she wore to a party celebrating Nylon magazine’s Young Hollywood issue in Los Angeles. Didier Baverel/FilmMagicWorst Dressed, Traveling Nightmare: Baz LuhrmannOne would think that Great Gatsby director Baz Luhrmann would have enough money to purchase a high-profile travel wardrobe. But Luhrmann took a more relaxed approach when arriving at Nice’s airport for the Cannes Film Festival on Monday. Apparently, that meant a neck purse. Jason LaVeris/FilmMagicWorst Dressed, Disco Reincarnated: Jennifer MorrisonFor Morrison, the Los Angeles premiere of Star Trek Into Darkness apparently meant dressing like an ice cadet at Studio 54.