Buda Gade/AKM Images/GSI Media; Carolyn Kaster/AP; Samir Hussein/WireImage, via Getty; Theo Wargo/GettyOur PicksMichelle Obama, Lindsay Lohan & More Best and Worst Dressed (PHOTOS)Michelle Obama celebrated Easter in Prabal Gurung, Emilia Clarke glittered in gold Versace, and Lindsay Lohan came undone in Brazil. See fashion’s highs and lows of the week.Isabel Wilkinson04.05.13 4:45 AM ETBuda Gade/AKM Images/GSI Media; Carolyn Kaster/AP; Samir Hussein/WireImage, via Getty; Theo Wargo/GettyBuda Gade/AKM Images/GSI Media; Carolyn Kaster/AP; Samir Hussein/WireImage, via Getty; Theo Wargo/Getty Michelle Obama celebrated Easter in Prabal Gurung, Emilia Clarke glittered in gold Versace, and Lindsay Lohan came undone in Brazil. See fashion’s highs and lows of the week. Carolyn Kaster/APBest Dressed, Sunday Best: Michelle ObamaThe first lady continued her recent habit of rewearing dresses with a Prabal Gurung cream-colored dress and jacket that first made an appearance in her wardrobe in 2010. But even after all these years, the dress held up—and was pitch-perfect for Easter services at St. John’s Episcopal Church. Samir Hussein/WireImage, via Getty Best Dressed, Feather in Her Cap: Sophie, Countess of WessexSophie, countess of Wessex, may have closely resembled a peacock at an Easter service in Windsor Castle over the weekend, but the blue suit, well, suited her. Theo Wargo/GettyBest Dressed, Some Gilded Gold: Emilia ClarkeThe Game of Thrones (and Breakfast at Tiffany’s) actress showed up at Late Night With Jimmy Fallon this week in an embroidered gold Versace mini-dress that would have been right at home on the back of Daenerys Targaryen. Larry Busacca/GettyBest Dressed, Split Personality Dress: Brit MarlingAt the New York premiere of The Company You Keep, actress Brit Marling wore a dress in two distinct moods: a black and white by Viktor & Rolf. Gennadi Avramenko/Epsilon, via Getty Best Dressed, Spring in Her Step: Olga KurylenkoThe Skyfall star—now promoting her new film, Oblivion, in Moscow—looked lovely in a sky-blue floral Elie Saab dress, Christian Louboutin heels, and a Ferragamo clutch. Rob Kim/FilmMagic, via Getty Best Dressed, Leatherette: Keri RussellIt’s a far cry from Felicity, but Keri Russell looked pretty badass in a leather number from The Row this weekend. Unfortunately, though, she may not have picked the best venue for a leather dress: an FX bowling event at the Lucky Strike Bowling lanes. Imeh Akpanudosen/GettyWorst Dressed, Sheer Problems: Mischa BartonIf you look at this quickly, you’d think there was a nice, nude-colored ribbon tied around the waist of Mischa Barton’s white dress. But no! It’s a crop top, and she wore a big white bra underneath. Stephen Lovekin/GettyWorst Dressed, Death Becomes Her: Jemima KirkeOh, Jessa, Jessa, Jessa. As much as we love you, this mix of loose velvets does no one any favors. Buda Gade/AKM Images / GSI MediaWorst Dressed, Mess of the Week: Lindsay LohanLindsay looked a little haggard as she deplaned in Florianópolis, Brazil, this week and, unfortunately, came slightly undone.