Fashion Cheat SheetBest & Worst Dressed of the WeekThe Fashion Beast Team03.14.14Fashion Cheat SheetBest & Worst Dressed of the WeekOlivia Munn donned a feminine de la Renta frock, Elle Fanning showed off her abs, and model Alessandra Ambrosio flaunted it in a crop top. Plus, more best and worst dressed of the week.The Fashion Beast Team03.14.14 5:41 PM ETGC Images; Getty; Invision for The Hollywood Reporter/AP Olivia Munn donned a feminine de la Renta frock, Elle Fanning showed off her abs, and model Alessandra Ambrosio flaunted it in a white crop top. Plus, more best and worst dressed of the week. Frederick M. Brown/GettyBest Dressed: Kate BeckinsaleActress Kate Beckinsale stunned at the United States Holocaust Memorial Museum's dinner on March 6 in Beverly Hills, wearing a light-pink, strapless satin dress with red-jeweled embroidery from Marchesa's Fall/Winter 2013 collection. JB Lacroix/GC ImagesBest Dressed: Alessandra AmbrosioIf you've got it, flaunt it! Supermodel Alessandra Ambrosio leaves the set of Extra on March 11 in L.A. wearing a white, two-piece ensemble that featured a knit, long-sleeved crop top and belted pencil skirt by Calvin Klein with strappy Christian Louboutin sandals. Todd Williamson/Invision for The Hollywood Reporter/APBest Dressed: Olivia MunnTo celebrate The Hollywood Reporter's "Most Powerful Stylists in Hollywood" on March 12, actress Olivia Munn chose a feminine, white lace gown with pink-and-green flower embroidery by Oscar de la Renta. She accessorized with strong, emerald green pieces, including a satin clutch and Charlotte Olympia pumps. Todd Williamson/Invision for The Hollywood Reporter/APBest Dressed: Elle FanningAt the same The Hollywood Reporter event, Elle Fanning sported a light blue crop top and a coordinating pencil skirt with brown detailing from Wes Gordon's Spring/Summer 2014 collection. Andrew H. Walker/GettyBest Dressed: Tilda SwintonTilda Swinton's androgynous look always serves her well. The actress arrived at a screening of Only Lovers Left Alive on March 12 in New York City in blue-and-black checkered trousers and overcoat layered atop a brown blouse. Larry Marano/WireImageYou Decide: Kim KardashianShine bright like a diamond, Kim Kardashian. The reality star attended the grand opening of DASH's Miami boutique on March 12 in a semi-sheer, silver-sequined, two-piece ensemble. Kudos to Kardashian for rocking a glistening crop top, but the proportions make her look a bit stiff and uncomfortable. Donato Sardella/WireImageWorst Dressed: Sarah Jessica ParkerEven Carrie Bradshaw can't pull off stirrup leggings. Sarah Jessica Parker celebrated her debut shoe collection in Los Angeles on March 6 in an outfit that was wrong in so many ways: there was a body suit with stirrups layered beneath a white lace dress. INFphoto.com, via Newscom Worst Dressed: Khloe KardashianKhloe Kardashian pulled out her tiniest Daisy Dukes for the Rick Ross Show in Los Angeles. Pairing petite denim with thigh-high leather boots? Not a good look for anyone, Khloe.