Our PicksBest & Worst Dressed of the WeekThe Fashion Beast Team12.13.13Our PicksBest & Worst Dressed of the WeekLupita Nyong'o stuns in red Elie Saab, Amy Adams covers up in black lace, and Kim Kardashian looks like a banana. Plus, more best and worst dressed of the week.The Fashion Beast Team12.13.13 6:44 PM ETGetty for Van Cleef & Arpels; Jason Merritt/Getty; Getty for DIFF; Ilya S. Savenok/Getty Lupita Nyong'o stuns in red Elie Saab, Amy Adams covers up in black lace, and Kim Kardashian looks like a banana. Plus, more best and worst dressed of the week. Ilya S. Savenok/GettyBest Dressed, Love Lace: Amy AdamsLooking more covered up than her American Hustle character, Amy Adams attended the New York screening of the film on December 8 in a black, semi-lace gown from Elie Saab's Spring/Summer 2014 collection with Neil Lane jewelry and Christian Louboutin pumps. Anita Bugge/WireImageBest Dressed, Regal Inspiration: Diane KrugerDressed in embellished, light blue, tan, and black Valentino Couture, Diane Kruger attended the European Film Awards in Berlin on December 7. Neilson Barnard/Getty for Van Cleef & ArpelsBest Dressed, Embracing Femininity: Blake LivelyBlake Lively celebrated the redesign of Van Cleef and Arpels' redesigned flagship store in NYC on December 10 in a lace black slip dress with white flower embroidery from Marchesa's Spring/Summer 2014 collection. She accessorized with Gucci shoes and jewelry from the company. Francois Guillot/AFP/GettyBest Dressed, Lady in Red: Lupita Nyong'oBreakthrough style star of 2013 Lupita Nyong'o sported a red statement dress to the Paris premiere of her film 12 Years a Slave on December 11. The lace and sequined Elie Saab frock was complimented by soft David Yurman earrings, red, pointed-toe Nicholas Kirkwood heels, and natural make-up. Gareth Cattermole/Getty for DIFFBest Dressed, All White Everything: Rooney MaraFor Rooney Mara, it's either black or white. The actress opted for the latter this time, wearing a structured, one-shoulder Lanvin gown to the Oxfam Charity Gala in Dubai on December 11. Franziska Krug/GettyBest Dressed, Funny Gone Flirty: Kristen WiigKristen Wiig looks so...girly and feminine. The funny-girl wore a Martin Grant dress clad with a strapless, geometric, black and white bodice and black skirt to the December 11 premiere of The Secret Life of Walter Mitty. She paired her neutral ensemble with a black manicure and gold Manolo Blahnik shoes. Cooper Neill/Getty for Chanel Worst Dressed, Too 'Cool' to Care?: Kristen StewartLooking, of course, like she doesn't care about her appearance—or the event, for that matter — Kristen Stewart, the new face of Chanel, attended the brand's pre-fall 2014 event in Dallas, Texas on December 10 wearing a grayish-blue cropped sweater with orange, wide-leg leather pants. You do you, K. Stew. Jason Merritt/GettyWorst Dressed, It Was All (Too) Yellow: Kim KardashianTalk about overkill. Kim Kardashian attended The Hollywood Reporter's annual Women in Entertainment breakfast on December 11 in a Lanvin dress, Max Mara coat, and Tom Ford heels that were all (too) yellow.