Our PicksBest and Worst Dressed of the Week (PHOTOS)Isabel Wilkinson05.24.13Our PicksBest and Worst Dressed of the Week (PHOTOS)Cannes brought out some wild ensembles. From the return of Elizabeth Taylor’s sapphire to Carey Mulligan, see fashion’s highs and lows of the week. By Isabel Wilkinson.Isabel Wilkinson05.24.13 8:45 AM ETVenturelli/WireImage;Dominique Charriau/WireImage;Tony Barson/FilmMagic;Mike Marsland/WireImage Cannes brought out some wild ensembles. From the return of Elizabeth Taylor’s sapphire to Carey Mulligan, see fashion’s highs and lows of the week. By Isabel Wilkinson. George Pimentel/WireImage, via GettyDita Von TeeseBest Dressed, Carpet Matches the Dress: The International Queen of Burlesque went all red in Elie Saab Couture at the Cannes premiere of Cleopatra on Tuesday. Joe Schildhorn/BFAnyc, via NewscomRachel Feinstein and Cindy ShermanBest Dressed, Check Mates: We can’t tell if this was a coordinated gimmick or happy accident: artists Rachel Feinstein and Cindy Sherman showed up to MOMA’s Party in the Garden—both wearing a long checkered dress by Marc Jacobs. If it was a surprise, they certainly didn’t show it: the pair smiled for the cameras together. Tony Barson/FilmMagicCarey MulliganBest Dressed, Winner of the Week: The toast of Cannes went uncontested to Mulligan, who attended the premiere of Inside Llewyn Davis in a black and white dress by Vionnet and Brian Atwood sandals. Pascal Le SegretainRooney Mara Best Dressed, in the Nude: Nude on nude on nude: Rooney Mara played it simple with a flesh-toned Calvin Klein frock at the brand’s Women in Film event in Cannes. Mike Marsland/WireImage, via GettyJennifer LawrenceBest Dressed, Power Peplum: The Oscar-winner went for a sleek black-and-white column dress by Christian Dior. She liked the dress so much that she wore it in a different color to a Hunger Games event later that same day. Best Dressed, Power Peplum: Jennifer Lawrence Tony Barson/FilmMagic, via GettyJessica ChastainBest Dressed, Channeling Liz: Jessica Chastain provided a blank canvas for her sapphire Bulgari necklace from the Elizabeth Taylor Collection—in the form of her simple, white Versace dress. “It was so thrilling to wear it, but I was overwhelmed, too,” she said of the necklace afterward. “It was a little scary. I was the first person to wear it since Elizabeth. I felt as if I was able to spend the day with her today by wearing the necklace.” Andreas Rentz/Getty ImagesAnita KravosWorst Dressed, Shlubbiest Person at Cannes: The actress looked like she was in her boyfriend’s jeans and shirt at a photo call for La Grande Bellezza—and her nonchalant pose didn’t help. Jean Christophe Magnenet/AFP/Getty ImagesParis HiltonWorst Dressed, TBT to 2004: The celebutante, dripping in jewels, looked straight out of the Bling Ring trailer as she arrived at a de Grisogono event in Cannes on May 21. Venturelli/WireImage, via GettyAlyson Le BorgesWorst Dressed: The strings accessory of the evening appeared to be a (samurai sword? ancient scroll?) holding Alyson Le Borges’s dress together at the Blood Ties premiere at Cannes. Jeff Bottari/Getty ImagesJennifer Morrison Worst Dressed, For Forgetting Her Slip: Jennifer Morrison showed the world her skivvies at the Billboard Music Awards on Sunday night. Dominique Charriau/WireImage, via GettyOlga SorokinaWorst Dressed, Olga Sorokina looked like a mixture between Dick Tracy and Céline Dion in this white ensemble at Cannes. Valery Hache/AFP/GettyPaz VegaWorst Dressed, Scissor Happy: It looked like the actress had lost the lower half of her dress as she arrived at the premiere of Jimmy P. (Psychotherapy of a Plains Indian) on May 26.