Best Dressed of the Week: Beyoncé Glimmers at the Brit Awards

Also, stunning looks from Rita Ora, Chanel Iman and more.

Queen of the World - Beyoncé shimmers in an emerald green sequin dress during her performance at the 2014 BRIT Awards 2014 at 02 Arena in London. (Photo: Ian Gavan/Getty Images)

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Beyoncé - Bey makes a surprise appearance at the Brit Awards Wednesday evening to perform "XO" and she does it in dazzling fashion. The singer shines in a Vrettos Vrettakos green long-sleeved gown with sheer panels in the sleeves. She accessorizes with pieces from her go-to jewelry designer, Lorraine Schwartz. (Photo: Ian Gavan/Getty Images)

Bright as the Sun - Brit chick Rita Ora is stunning in yellow on the red carpet of the 2014 BRIT Awards held at 02 Arena in London. (Photo: Anthony Harvey/Getty Images)

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Rita Ora - The singer is a spot of sunshine at the Brit Awards in London. She wears this vibrant yellow Prada dress embellished with green rhinestones. We hardly recognized her without her signature red lipstick! (Photo: Anthony Harvey/Getty Images)

Photo By Photo: Anthony Harvey/Getty Images

Iggy Azalea - The rapper looks quite classy for the Brit Awards in a red Elie Saab Resort 2014 sleeveless gown with sheer inserts and natural makeup.  (Photo: Anthony Harvey/Getty Images)

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Iggy Azalea - The rapper looks quite classy for the Brit Awards in a red Elie Saab Resort 2014 sleeveless gown with sheer inserts and natural makeup. (Photo: Anthony Harvey/Getty Images)

Lupita Nyong'o - Let's face it — it really wouldn't be a "Best Dressed of the Week" without an appearance from our girl Lupita Nyong'o, who attends the DuJour magazine cover party (held in her honor) in this Peter Pilotto Mira Resort 2014 printed frock.   (Photo: Larry Busacca/Getty Images for DuJour Magazine)

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Lupita Nyong'o - Let's face it — it really wouldn't be a "Best Dressed of the Week" without an appearance from our girl Lupita Nyong'o, who attends the DuJour magazine cover party (held in her honor) in this Peter Pilotto Mira Resort 2014 printed frock. (Photo: Larry Busacca/Getty Images for DuJour Magazine)

Chrissy Teigen - The SI model never fails to impress both with her style and super-fun attitude. The model attends the Club SI Swimsuit Party at LIV Nightclub hosted by Sports Illustrated at Fontainebleau Miami wearing a Fyodor Golan turquoise-and-blush leather crop top and matching skirt.   (Photo: Frazer Harrison/Getty Images for Sports Illustrated)

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Chrissy Teigen - The SI model never fails to impress both with her style and super-fun attitude. The model attends the Club SI Swimsuit Party at LIV Nightclub hosted by Sports Illustrated at Fontainebleau Miami wearing a Fyodor Golan turquoise-and-blush leather crop top and matching skirt. (Photo: Frazer Harrison/Getty Images for Sports Illustrated)

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Chanel Iman - She might have kept her look simple, but the model is quite the goddess at the Sports Illustrated 50 Years of Swim celebration. Iman picks a Rami Al Ali beaded silver pleated gown with a plunging neckline.  (Photo: Jamie McCarthy/Getty Images for Sports Illustrated)

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Chanel Iman - She might have kept her look simple, but the model is quite the goddess at the Sports Illustrated 50 Years of Swim celebration. Iman picks a Rami Al Ali beaded silver pleated gown with a plunging neckline. (Photo: Jamie McCarthy/Getty Images for Sports Illustrated)

Jourdan Dunn - The model is certainly working the red carpet and those long legs at Elle’s Style Awards with this leather black-and-white body con Tom Ford mini.  (Photo: Ian Gavan/Getty Images)

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Jourdan Dunn - The model is certainly working the red carpet and those long legs at Elle’s Style Awards with this leather black-and-white body con Tom Ford mini. (Photo: Ian Gavan/Getty Images)

Gabrielle Union - The Being Mary Jane star stuns us each time she hits the red carpet because she is just aging beautifully. The 41-year-old actress shows up at the GQ & LeBron James NBA All-Star Party in this form-fitting Moschino strapless black mini dress with gold details. She completes the look with black Giuseppe Zanotti pumps and a clutch.   (Photo: Michael Loccisano/Getty Images for GQ)

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Gabrielle Union - The Being Mary Jane star stuns us each time she hits the red carpet because she is just aging beautifully. The 41-year-old actress shows up at the GQ & LeBron James NBA All-Star Party in this form-fitting Moschino strapless black mini dress with gold details. She completes the look with black Giuseppe Zanotti pumps and a clutch. (Photo: Michael Loccisano/Getty Images for GQ)

Leading Lady - Naomie Harris attends Burberry Womenswear Autumn/Winter 2014 at Kensington Gardens during London Fashion Week. (Photo: Ian Gavan/Getty Images for Burberry)

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Naomie Harris - The actress is super posh at the Burberry Prorsum Fall 2014 Womenswear Show during London Fashion Week. Harris wraps up in a velvet, patterned coat and chartreuse velvet peep-toe sandals. (Photo: Ian Gavan/Getty Images for Burberry)

Pharrell Williams - Pharrell always marches to the beat of his own drum and this holds true for his fashion sense, too. For the Elle Style Awards, he foregoes a typical suit for this Lanvin black leopard-effect tuxedo blazer, cropped trousers and leather derbies.   (Photo: Ian Gavan/Getty Images)

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Pharrell Williams - Pharrell always marches to the beat of his own drum and this holds true for his fashion sense, too. For the Elle Style Awards, he foregoes a typical suit for this Lanvin black leopard-effect tuxedo blazer, cropped trousers and leather derbies. (Photo: Ian Gavan/Getty Images)