Best Dressed of the Week: Joan Smalls Brings the Heat

Plus, must-see looks from Keke Palmer, Beyoncé and more.

Joan Smalls - The supermodel pulls out all the stops for the 2015 Vanity Fair Tribeca Film Festival in NYC wearing a House of CB "Riko" black leatherette, strapless, cutout pencil dress. This fit has good girl gone bad written all over it. By Jazmine A. Ortiz  (Photo: Dimitrios Kambouris/Getty Images for the 2015 Tribeca Film Festival)

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Joan Smalls - The supermodel pulls out all the stops for the 2015 Vanity Fair Tribeca Film Festival in NYC wearing a House of CB "Riko" black leatherette, strapless, cutout pencil dress. This fit has good girl gone bad written all over it. By Jazmine A. Ortiz (Photo: Dimitrios Kambouris/Getty Images for the 2015 Tribeca Film Festival)

Keke Palmer - The actress attends the LA premiere of her film Brotherly Love in a mint green Michael Costello chiffon dress with thigh-high slit. It's so airy and fresh and perfect for the young starlet.  (Photo: Nicky Nelson/WENN.com)

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Keke Palmer - The actress attends the LA premiere of her film Brotherly Love in a mint green Michael Costello chiffon dress with thigh-high slit. It's so airy and fresh and perfect for the young starlet. (Photo: Nicky Nelson/WENN.com)

Photo By Photo: Nicky Nelson/WENN.com

Jessica Alba - The mommy mogul steps out in NYC wearing a charming spring-worthy combo. Style credits include an A.L.C. striped top, Ralph Lauren navy blazer, and Alice + Olivia wide-legged pants.  (Photo: RGK, PacificCoastNews)

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Jessica Alba - The mommy mogul steps out in NYC wearing a charming spring-worthy combo. Style credits include an A.L.C. striped top, Ralph Lauren navy blazer, and Alice + Olivia wide-legged pants. (Photo: RGK, PacificCoastNews)

Beyoncé - Bey is on the scene of the Giuseppe Zanotti Beverly Hills store opening. She's spotted in a white Bec and Bridge crop top and skirt set, and tops it all off with her favorite fedora.  (Photo: Frazer Harrison/Getty Images for Giuseppe Zanotti)

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Beyoncé - Bey is on the scene of the Giuseppe Zanotti Beverly Hills store opening. She's spotted in a white Bec and Bridge crop top and skirt set, and tops it all off with her favorite fedora. (Photo: Frazer Harrison/Getty Images for Giuseppe Zanotti)

Naya Rivera - The mommy-to-be also makes an appearance at the Giuseppe Zanotti Beverly Hills store opening. She styles her bump in a black organza gown.  (Photo: Frazer Harrison/Getty Images for Giuseppe Zanotti)

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Naya Rivera - The mommy-to-be also makes an appearance at the Giuseppe Zanotti Beverly Hills store opening. She styles her bump in a black organza gown. (Photo: Frazer Harrison/Getty Images for Giuseppe Zanotti)

Photo By Photo: Frazer Harrison/Getty Images for Giuseppe Zanotti

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Hannah Bronfman - The model/DJ hits Popsugar and ShopStyle’s Coachella Cabana Club pool party in a bikini top and floral trousers by Etro.  (Photo: Mike Windle/Getty Images for POPSUGAR)

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Hannah Bronfman - The model/DJ hits Popsugar and ShopStyle’s Coachella Cabana Club pool party in a bikini top and floral trousers by Etro. (Photo: Mike Windle/Getty Images for POPSUGAR)

Photo By Photo: Mike Windle/Getty Images for POPSUGAR

Camila Alves - Matthew McConaughey's lovely wife attends the Lilly Pulitzer for Target launch event in NYC donning a $38 shift dress from the brand with a white blazer and white pumps.  (Photo: Neilson Barnard/Getty Images for Target)

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Camila Alves - Matthew McConaughey's lovely wife attends the Lilly Pulitzer for Target launch event in NYC donning a $38 shift dress from the brand with a white blazer and white pumps. (Photo: Neilson Barnard/Getty Images for Target)

Photo By Photo: Neilson Barnard/Getty Images for Target

Chrissy Teigen - We love this Cali-cool vibe Chrissy is giving on the set of her photo shoot in Los Angeles. She keeps it stylish in a pair of Oxydo shades, a cropped jacket, high-waist skinnies and black ankle-strap sandals.  (Photo: GONZALO/Bauer-Griffin/GC Images)

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Chrissy Teigen - We love this Cali-cool vibe Chrissy is giving on the set of her photo shoot in Los Angeles. She keeps it stylish in a pair of Oxydo shades, a cropped jacket, high-waist skinnies and black ankle-strap sandals. (Photo: GONZALO/Bauer-Griffin/GC Images)

Jennifer Lopez - This is almost too easy for the Idol judge now! She dazzles backstage in a custom diamond-encrusted cocktail dress with gold and white accents by Nicolas Jebran, paired with Stuart Weitzman Nudist sandals.(Photo: Michael Becker/FOX via Getty Images)

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Jennifer Lopez - This is almost too easy for the Idol judge now! She dazzles backstage in a custom diamond-encrusted cocktail dress with gold and white accents by Nicolas Jebran, paired with Stuart Weitzman Nudist sandals.(Photo: Michael Becker/FOX via Getty Images)

Ciara - Ciara always serves up something hot! This time she werks an all-black ensemble for an interview with Power 105.1's Breakfast Club.   (Photo: Ron Asadorian / Splash News)

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Ciara - Ciara always serves up something hot! This time she werks an all-black ensemble for an interview with Power 105.1's Breakfast Club. (Photo: Ron Asadorian / Splash News)

Photo By Photo: Ron Asadorian / Splash News