Best Dressed of the Week: Alicia Keys on Fire

Plus, Chanel Iman, Rihanna and more head-turning outfits.

Alicia Keys - The singer goes girlie-girl for her Keep a Child Alive Black Ball gala, choosing a gorgeous burgundy gown by Azzedine Alaia.(Photo: Ben Hider/Getty Images)

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Alicia Keys - The singer goes girlie-girl for her Keep a Child Alive Black Ball gala, choosing a gorgeous burgundy gown by Azzedine Alaia.(Photo: Ben Hider/Getty Images)

Chanel Iman - Also at Alicia's Black Ball party, supermodel Chanel Iman took to the red carpet in a strapless shimmering gown.(Photo: Ben Hider/Getty Images)

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Chanel Iman - Also at Alicia's Black Ball party, supermodel Chanel Iman took to the red carpet in a strapless shimmering gown.(Photo: Ben Hider/Getty Images)

Jennifer Hudson - Jennifer pulls off red leather shorts with ease, wearing them with tights, booties, a camel sweater and an oversize black cardigan to a Lucky magazine event in New York.(Photo: Bennett Raglin/Getty Images)

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Jennifer Hudson - Jennifer pulls off red leather shorts with ease, wearing them with tights, booties, a camel sweater and an oversize black cardigan to a Lucky magazine event in New York.(Photo: Bennett Raglin/Getty Images)

Ashley Madekwe - Ashley Madekwe makes a splash in a multi-colored dress and her favorite Christian Louboutin sandals at the Rodeo Drive Walk of Style event honoring BVLGARI in Beverly Hills.(Photo: Roger Walsh /Landov)

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Ashley Madekwe - Ashley Madekwe makes a splash in a multi-colored dress and her favorite Christian Louboutin sandals at the Rodeo Drive Walk of Style event honoring BVLGARI in Beverly Hills.(Photo: Roger Walsh /Landov)

Top Model Style - Model and House of Style host Joan Smalls hits the red carpet for HBO's In Vogue: The Editor's Eye screening at Metropolitan Museum of Art in New York City. (Photo: Theo Wargo/Getty Images for HBO)

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Joan Smalls - Here's a holiday party look we wouldn't mind borrowing! At HBO’s Editor’s Eye Screening at the Metropolitan Museum of Art, Joan Smalls sports a festive ensemble from Prabal Gurung’s Spring 2013 collection.(Photo: Theo Wargo/Getty Images for HBO)

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Jordin Sparks - 'Tis the season for red hot, of which Jordin is clearly aware. She wears a super-fitted Nicole Miller mini and black lacy pumps to L.A.'s Jingle Ball ceremony.(Photo: Imeh Akpanudosen/Getty Images)

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Jordin Sparks - 'Tis the season for red hot, of which Jordin is clearly aware. She wears a super-fitted Nicole Miller mini and black lacy pumps to L.A.'s Jingle Ball ceremony.(Photo: Imeh Akpanudosen/Getty Images)

Rihanna - For her "Nude" fragrance launch in California, the pop star wears a lace-skirted romper and white bustier with a golden choker and black pumps.(Photo: Merritt/Getty Images)

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Rihanna - For her "Nude" fragrance launch in California, the pop star wears a lace-skirted romper and white bustier with a golden choker and black pumps.(Photo: Merritt/Getty Images)

Zoe Saldana - At a Children's Defense Fund event in Beverly Hills, the stunning actress poses in a sophisticated belted Giambattista Valli dress and matching T-strap heels.(Photo: Mark Davis/Getty Images for CDF)

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Zoe Saldana - At a Children's Defense Fund event in Beverly Hills, the stunning actress poses in a sophisticated belted Giambattista Valli dress and matching T-strap heels.(Photo: Mark Davis/Getty Images for CDF)

Kerry Washington - The Scandal star revs things up in a sexy snake-print dress and oversize buckle sandals at L.A. Confidential's anniversary bash in Hollywood.(Photo: Vincent Sandoval/WireImage)

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Kerry Washington - The Scandal star revs things up in a sexy snake-print dress and oversize buckle sandals at L.A. Confidential's anniversary bash in Hollywood.(Photo: Vincent Sandoval/WireImage)

Michelle Obama - First lady Michelle Obama picks a winning shimmery champagne-colored skirt suit to welcome military families during a preview of the White House holiday decorations.(Photo: MAI/Greg E. Mathieson /Landov)

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Michelle Obama - First lady Michelle Obama picks a winning shimmery champagne-colored skirt suit to welcome military families during a preview of the White House holiday decorations.(Photo: MAI/Greg E. Mathieson /Landov)