Best Dressed of the Week: Keke Palmer Kills It in Alexander Wang

Plus, must-see looks from Jennifer Lopez and others.

Keke Palmer - Keke kills the Instagram game in an Alexander Wang ensemble. Shop Alexander Wang for H&M to cop a look as sexy and cool as the starlet’s. By Jazmine A. Ortiz (Photo: Keke Palmer via Instagram)

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Keke Palmer - Keke kills the Instagram game in an Alexander Wang ensemble. Shop Alexander Wang for H&M to cop a look as sexy and cool as the starlet’s. By Jazmine A. Ortiz (Photo: Keke Palmer via Instagram)

Photo By Photo: Keke Palmer via Instagram

Beyoncé and Blue Ivy Carter - Queen Bey pairs her striped leather and satin pencil skirt with a white off-the-shoulder top and funky stilettos for a trip out in NYC. Her baby girl is equally sassy, flaunting a black feathered skirt, leather jacket and classic Mary Janes. (Photo by Alo Ceballos/GC Images)

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Beyoncé - Lady Bey has a shining NYC street style moment in a multi-colored Tanya Taylor skirt. Blue Ivy gets an honorable mention, too, for this all-black leather and fringe getup. (Photo: Alo Ceballos/GC Images)

Sexy Lady - Jennifer Lopez shows a little skin as she arrives to The Late Show With David Letterman in New York City.(Photo: Splash News)

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Jennifer Lopez - For The Late Show With David Letterman, the star stuns in a Milly crop top and Paule Ka wide-leg tuxedo pants, finished with a sleek Noon by Noor cape. (Photo: Splash News)

Kerry Washington - The Scandal actress hits The View in this delightful confection. Her cobalt frock and patterned jacket stand out among darker looks of the season. (Photo: INFphoto.com)

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Kerry Washington - The Scandal actress hits The View in this delightful confection. Her cobalt frock and patterned jacket stand out among darker looks of the season. (Photo: INFphoto.com)

Sleek and Chic - Tennis champ Serena Williams attends the 11th annual CFDA/Vogue Fashion Fund Awards at Spring Studios in New York City. (Photo: Theo Wargo/Getty Images)

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Serena Williams - The tennis star attends the 11th annual CFDA/Vogue Fashion Fund Awards in NYC, showing off those guns in a navy Zac Posen number. (Photo: Theo Wargo/Getty Images)

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Selena Gomez - The singer takes the plunge in a sequin Gucci gown at the 2014 LACMA Art and Film Gala in Los Angeles. (Photo: Jason Merritt/Getty Images for LACMA)

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Selena Gomez - The singer takes the plunge in a sequin Gucci gown at the 2014 LACMA Art and Film Gala in Los Angeles. (Photo: Jason Merritt/Getty Images for LACMA)

Alicia Quarles - The E! News correspondent dresses for success outside her New York City hotel in a sophisticated Donna Karan dress and L.A.M.B. heels. (Photo: Santi / Splash News)

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Alicia Quarles - The E! News correspondent dresses for success outside her New York City hotel in a sophisticated Donna Karan dress and L.A.M.B. heels. (Photo: Santi / Splash News)

Joan Smalls - The model slays the carpet in Chanel at WSJ Magazine's 2014 Innovator Awards at the Museum of Modern Art in NYC. Now, lets talk about these shoes. Her Nicholas Kirkwood Resort 2015 lace-up sandals are perfectly on-trend. (Photo: Mike Coppola/Getty Images)

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Joan Smalls - The model slays the carpet in Chanel at WSJ Magazine's 2014 Innovator Awards at the Museum of Modern Art in NYC. Now, lets talk about these shoes. Her Nicholas Kirkwood Resort 2015 lace-up sandals are perfectly on-trend. (Photo: Mike Coppola/Getty Images)

Ciara - Is it a dress or pants? Either way, we love CiCi's all-white look by French couture brand Vionnet. (Photo: Ciara via Instagram)

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Ciara - Is it a dress or pants? Either way, we love CiCi's all-white look by French couture brand Vionnet. (Photo: Ciara via Instagram)

Naomi Campbell - The supermodel always leaves us dazzled! Here she is rocking a sleeveless halter-neck dress from Proenza Schouler’s Fall 2014 collection at the 18th Annual Accessories Council ACE Awards in New York City. (Photo: Jamie McCarthy/Getty Images for ACE Awards)

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Naomi Campbell - The supermodel always leaves us dazzled! Here she is rocking a sleeveless halter-neck dress from Proenza Schouler’s Fall 2014 collection at the 18th Annual Accessories Council ACE Awards in New York City. (Photo: Jamie McCarthy/Getty Images for ACE Awards)