Best Dressed of the Week: Sevyn Streeter Looking Svelte

Plus, must-see looks from Rihanna, Kylie Jenner and others.

Sevyn Streeter - LBD at its finest! The singer gets sexy in a black mesh dress and black undergarments at Debra Lee's pre-dinner for the 2015 BET Awards. By Jazmine A. Ortiz(Photo: Jason Kempin/BET/Getty Images for BET)

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Sevyn Streeter - LBD at its finest! The singer gets sexy in a black mesh dress and black undergarments at Debra Lee's pre-dinner for the 2015 BET Awards. By Jazmine A. Ortiz(Photo: Jason Kempin/BET/Getty Images for BET)

Tracee Ellis Ross - The Black-ish star gives us the breakdown on her entire look for Debra Lee's pre-dinner for the 2015 BET Awards: Veronique Leroy dress, American Apparel bralette, Gap briefs, Louboutin pumps, and a Judith Leiber clutch. She styles it all with earrings she wore to her prom!(Photo: Tracee Ellis Ross via Instagram)

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Tracee Ellis Ross - The Black-ish star gives us the breakdown on her entire look for Debra Lee's pre-dinner for the 2015 BET Awards: Veronique Leroy dress, American Apparel bralette, Gap briefs, Louboutin pumps, and a Judith Leiber clutch. She styles it all with earrings she wore to her prom!(Photo: Tracee Ellis Ross via Instagram)

V. Bozeman - The Empire star hits the 8th Annual Toast to Urban Music Executives in a stellar black-and-white, v-neck jumpsuit. And her gold statement necklace really pulls this whole piece together.(Photo: Koi Sojer, PacificCoastNews)

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V. Bozeman - The Empire star hits the 8th Annual Toast to Urban Music Executives in a stellar black-and-white, v-neck jumpsuit. And her gold statement necklace really pulls this whole piece together.(Photo: Koi Sojer, PacificCoastNews)

Rihanna - RiRi arrives to Hooray Henry's in L.A. in a pinstripe shorts set. The fit is hot, plus the fabric is relaxed enough for a night of partying.(Photo: Photographer Group / Splash News)

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Rihanna - RiRi arrives to Hooray Henry's in L.A. in a pinstripe shorts set. The fit is hot, plus the fabric is relaxed enough for a night of partying.(Photo: Photographer Group / Splash News)

Tia Mowry - For a casual stroll about town the Instant Mom actress wears One by Teaspoon overalls, a hat by Lack of Color, a Givenchy purse, Birkenstocks, a top by NOE, and finishes off her #OOTD with shades by Valley eye wear. Great styling!(Photo: Tia Mowry via Instagram)

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Tia Mowry - For a casual stroll about town the Instant Mom actress wears One by Teaspoon overalls, a hat by Lack of Color, a Givenchy purse, Birkenstocks, a top by NOE, and finishes off her #OOTD with shades by Valley eye wear. Great styling!(Photo: Tia Mowry via Instagram)

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Uzo Aduba - Off-screen, the Orange Is the New Black actress is a sucker for floral skirts. We can see why — she knows how to werk 'em!(Photo: Uzo Aduba via Instagram)

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Uzo Aduba - Off-screen, the Orange Is the New Black actress is a sucker for floral skirts. We can see why — she knows how to werk 'em!(Photo: Uzo Aduba via Instagram)

Naomi Campbell - For the 2015 Fragrance Awards in NYC, the supermodel broke out a custom gown created for her by Versace — 18 years ago! Impressive.(Photo: Naomi Campbell via Instagram)

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Naomi Campbell - For the 2015 Fragrance Awards in NYC, the supermodel broke out a custom gown created for her by Versace — 18 years ago! Impressive.(Photo: Naomi Campbell via Instagram)

Kim Kardashian - Mrs. West loves her some Balmain! She struts her stuff in the brand while out and about in Cannes, France.(Photo: Kim Kardashian via Instagram)

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Kim Kardashian - Mrs. West loves her some Balmain! She struts her stuff in the brand while out and about in Cannes, France.(Photo: Kim Kardashian via Instagram)

Kylie Jenner - The younger Jenner attends the Sugar Factory opening in Miami Beach wearing a black plunging House of Zhivago gown. Her entire look seems like it was pulled straight out of big sis Kim Kardashian's closet.(Photo: Gustavo Caballero/Getty Images)

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Kylie Jenner - The younger Jenner attends the Sugar Factory opening in Miami Beach wearing a black plunging House of Zhivago gown. Her entire look seems like it was pulled straight out of big sis Kim Kardashian's closet.(Photo: Gustavo Caballero/Getty Images)

Photo By Photo: Gustavo Caballero/Getty Images

Mel B - This classic black-and-white color blocking is the only spice this girl needs. (Photo: Ray Tamarra/GC Images)

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Mel B - This classic black-and-white color blocking is the only spice this girl needs. (Photo: Ray Tamarra/GC Images)