Best Dressed of the Week: Michelle Obama Shines in Yellow

Plus, must-see looks from Angela Simmons and others.

First Lady Michelle Obama - Mark this as another win for the first lady. Mrs. Obama is absolutely beautiful in her bold yellow Prabal Gurung halter dress, finished with a polished topknot and a pretty stack of gold bangles. (Photo: Stringer/Anadolu Agency/Getty Images)

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First Lady Michelle Obama - Mark this as another win for the first lady. Mrs. Obama is absolutely beautiful in her bold yellow Prabal Gurung halter dress, finished with a polished topknot and a pretty stack of gold bangles. (Photo: Stringer/Anadolu Agency/Getty Images)

Angela Simmons  - The AngelaIAm designer hits us with her street chic ensemble in N.Y.C. Everything from the short-shorts to the lace-up thigh-high booties screams sassy! (Photo: Angela Simmons via Instagram)

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Angela Simmons  - The AngelaIAm designer hits us with her street chic ensemble in N.Y.C. Everything from the short-shorts to the lace-up thigh-high booties screams sassy! (Photo: Angela Simmons via Instagram)

Photo By Photo: Angela Simmons via Instagram

Kim Kardashian - Kim is peachy keen in her Bec & Bridge frock and matching Prada sandals at the launch of the Kardashian Sun Kissed collection in L.A. (Photo: Jason Merritt/Getty Images)

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Kim Kardashian - Kim is peachy keen in her Bec & Bridge frock and matching Prada sandals at the launch of the Kardashian Sun Kissed collection in L.A. (Photo: Jason Merritt/Getty Images)

Photo By Photo: Jason Merritt/Getty Images

Zendaya - Z enjoys some shopping in downtown L.A. while giving us a little midriff action in a pencil skirt, Adidas sneaks and a Badwood cropped sweatshirt. (Photo: PacificCoastNews)

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Zendaya - Z enjoys some shopping in downtown L.A. while giving us a little midriff action in a pencil skirt, Adidas sneaks and a Badwood cropped sweatshirt. (Photo: PacificCoastNews)

Melanie Brown - This former Spice Girl works the colorblock trend in a Roksanda skirt and black bustier. She keeps the accessories to a minimum to complement her sleek look. (Photo: Guillermo, PacificCoastNews)

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Melanie Brown - This former Spice Girl works the colorblock trend in a Roksanda skirt and black bustier. She keeps the accessories to a minimum to complement her sleek look. (Photo: Guillermo, PacificCoastNews)

Photo By Photo: Guillermo

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Rocsi Diaz - The Entertainment Tonight host steals the scene in Greece in a sweet floral skirt and black crop top. She adds some edge with a black leather biker jacket. (Photo: Rocsi Diaz via Instagram)

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Rocsi Diaz - The Entertainment Tonight host steals the scene in Greece in a sweet floral skirt and black crop top. She adds some edge with a black leather biker jacket. (Photo: Rocsi Diaz via Instagram)

Photo By Photo: Rocsi Diaz via Instagram

Beyoncé - Bey shuts down Instagram with her #instastyle in 3.1 Phillip Lim's pants/skirt hybrid, a Charlotte Olympia clutch and Giuseppe Zanotti sandals. (Photo: Beyonce via Instagram)

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Beyoncé - Bey shuts down Instagram with her #instastyle in 3.1 Phillip Lim's pants/skirt hybrid, a Charlotte Olympia clutch and Giuseppe Zanotti sandals. (Photo: Beyonce via Instagram)

Jessica Alba - Jess keeps it chic and colorful in a striped Houghton top teamed with a high-waist Osman skirt, Kotur “Gilda” sandals and a snakeskin Christian Louboutin tote we wouldn’t mind adding to our own collection. (Photo: Alberto Reyes/WENN.com)

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Jessica Alba - Jess keeps it chic and colorful in a striped Houghton top teamed with a high-waist Osman skirt, Kotur “Gilda” sandals and a snakeskin Christian Louboutin tote we wouldn’t mind adding to our own collection. (Photo: Alberto Reyes/WENN.com)

Selena Gomez - The young starlet goes mod, pairing her high-neck Kaelen striped blouse with inky black skinnies and matching platform booties. Those pink oval sunnies are a nice touch, too. (Photo:  Juan Sharma/Bruja,PacificCoastNews)

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Selena Gomez - The young starlet goes mod, pairing her high-neck Kaelen striped blouse with inky black skinnies and matching platform booties. Those pink oval sunnies are a nice touch, too. (Photo:  Juan Sharma/Bruja,PacificCoastNews)

Keke Palmer - The Just Keke host beats the heat in a simple yet sexy look comprised of a ribbed halter top and front-slit skirt, adding navy sandals and a matching shoulder bag to make it pop. (Photo: Keke Palmer via Instagram)

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Keke Palmer - The Just Keke host beats the heat in a simple yet sexy look comprised of a ribbed halter top and front-slit skirt, adding navy sandals and a matching shoulder bag to make it pop. (Photo: Keke Palmer via Instagram)