Our PicksRihanna, Mariah Carey, Oprah and More Best & Worst Dressed (PHOTOS)Isabel Wilkinson08.09.13Our PicksRihanna, Mariah Carey, Oprah and More Best & Worst Dressed (PHOTOS)Diane Kruger opted for florals, Amanda Seyfried glittered in Gucci, and Lily Collins flashed some midriff. See fashion’s highs and lows of the week. Isabel Wilkinson08.09.13 8:45 AM ETJason Kempin/Getty; Paul A. Hebert/Getty; Rob Kim/GettyDiane Kruger opted for florals, Amanda Seyfried glittered in Gucci, and Lily Collins flashed some midriff. See fashion’s highs and lows of the week. Paul A. Hebert/GettyBest Dressed, Not-So-Scandalous: Kerry WashingtonKerry Washington always looks fabulous—and the Television Critics Association’s Summer Press Tour was no exception. She wore a red-and-white Giambattista Valli dress with taupe Christian Louboutin pumps. David Tonnessen/PacificCoastNewsBest Dressed, Summer White: Emilia ClarkeThe Game of Thrones star went straight to the Chateau Marmont after the TCA party in Los Angeles on Saturday, where she was photographed in a perfect white column dress from Jason Wu’s Resort 2014 collection, Jason Wu clutch, and Bruno Magli sandals. Larry Busacca/Getty for The Weinstein CompanyBest Dressed Couple of the Week: Naomi Watts and Liev SchreiberSo simple, and yet so good: Watts and Schreiber looked lovely at the New York premiere of The Butler, the new Lee Daniels film in which Schreiber portrays Lyndon B. Johnson. Watts looked especially chic in a black Thakoon jumpsuit and Givenchy heels. Jason Kempin/GettyBest Dressed, All That Glitters: Amanda SeyfriedAt the Hollywood premiere of Lovelace—the film about Linda Lovelace that opens Friday—Amanda Seyfried glittered in a short Gucci frock and Givenchy sandals. Charles Sykes/Invision/APBest Dressed Injury of the Week: Mariah CareySince she broke her arm, Mariah Carey has made something of a meme out of her bedazzled casts—showing up in an assortment of beaded bandages. The one she rocked at The Butler’s New York premiere was true to fashion: big, bold, and blingy. Jamie McCarthy/GettyBest Dressed, First Lady of Frizz: OprahOprah made news for the 3.5-pound wig she wore on the cover of O this month—and her real-life hair on the red carpet of The Butler was almost as dramatic. The Queen of Everything wore a knee-length, sequined Theia cocktail dress and Bottega Veneta clutch. Paul A. Hebert/GettyBest Dressed, Garden Variety: Diane KrugerThe actress looked typically delightful in a Mary Katrantzou strapless dress at the Fox All-Star Party during TCA on August 1st in LA. Splash NewsWackiest of the Week: RihannaThough she’s known now for her love of crop-tops and drop-crotches, Rihanna bared (almost) all on a trip to the Carnival celebration in Barbados over the weekend—and looked pretty insane while doing it. Alberto E. Rodriguez/GettyWorst Dressed, Meh: Michelle DockeryLady Mary didn’t do herself any favors with the washed-out short-suit she wore to the Downton Abbey Season 4 photo call in L.A. this week. Rob Kim/GettyWorst Dressed, Too Much Midriff: Lily CollinsLily Collins’s future may be bright—but her revealing outfit missed the mark at the Seventeen magazine September cover issue party on August 6. Alberto E. Rodriguez/Getty for PMC Worst Dressed, What on Earth: Cat DeeleyThe So You Think You Can Dance star looked fit for the beach on top—but fit for a tiki on the bottom—at the Young Hollywood Awards in Santa Monica on August 1st.