Our PicksBest & Worst Dressed of the WeekThe Fashion Beast Team02.21.14Our PicksBest & Worst Dressed of the WeekLupita Nyong'o is radiant in emerald, Rita Ora rocks a vibrant Prada gown, and Poppy Delevingne looks sophisticated. Plus, more best and worst dressed of the week.The Fashion Beast Team02.21.14 10:45 AM ETGetty for CHANEL; FameFlynetUK; Getty Lupita Nyong'o is radiant in emerald green Dior, Rita Ora rocks a vibrant Prada gown, and Poppy Delevingne looks sophisticated in a two-piece Emilia Wickstead ensemble. Plus, more best and worst dressed of the week. Chris Jackson/GettyBest Dressed: Lupita Nyong'oActress Lupita Nyong'o stunned at the EE British Academy Film Awards on February 16 in a strapless, emerald green gown by Christian Dior cinched at the waist with a gold belt and paired with custom Christian Louboutin heels. Ian Gavan/GettyBest Dressed: Poppy DelevingneFor the 2014 Elle Style Awards on February 18, Poppy Delevingne donned a two-piece, gold Emilia Wickstead ensemble consisting of a turtleneck lace crop top and a loose pencil skirt. Stuart C. Wilson/GettyBest Dressed: Karolina KurkovaKarolina Kurkova attended the Creative London party on February 17 in an oversized white sweatshirt with navy daisy appliqués and a coordinating pleated skirt. She accessorized with a black-and-white box clutch by Urania Gazelli and white pointed-toe heels. Anthony Harvey/GettyBest Dressed: Rita OraSinger Rita Ora killed in at the BRIT Awards on February 19 in a vibrant yellow gown with green rhinestone detailing by Prada. Chris Jackson/Getty for CHANELBest Dressed: Naomie HarrisNaomie Harris stood out at the Charles Finch & Chanel Pre-BAFTA Party on February 15 in London, rocking a highly-coveted white, asymmetrical dress printed with swatches of color from Chanel's Spring/Summer 2014 collection. Samir Hussein/WireImageBest Dressed: Emma WatsonA daring choice! Emma Watson donned a short black, multi-textured Giambattista Valli couture dress, Christian Louboutin heels, a Sophie Bille Brahe ear cuff, and Bouchoron and Catbird rings at the Elle Style Awards on February 18. Karwai Tang/WireImageBest Dressed: Angelina JolieAngelina Jolie attended the EE British Academy Film Awards on February 16, rocking a menswear-inspired blazer over a loose, slightly-unbuttoned white top, tailored trousers, and black patent heels, all by Saint Laurent. FameFlynetUKWorst Dressed: Lily AllenLily Allen looked like a present come to life, wearing way too much pink and red satin and an oversized trailing bow at the BAFTA Awards on February 16. Plus, she had numerous light pink antennas shooting out of the back of her head. Sigh. Tim P. Whitby/GettyWorst Dressed: Jessie JThe salmon Tom Ford cut-out minidress stunned on the runway, but on Jessie J at the Elle Style Awards on February 18? Not so much. The black, thigh-high, lace-up boots and bold clutch are proof that accessories can easily turn a look from rad to bad. Chris Jackson/GettyWorst Dressed: Ruth WilsonBetween the metallic color and oddly-shaped pouch around her midsection, actress Ruth Wilson looked totally off at the EE British Academy Film Awards on February 16.