Best Dressed of the Week: Rihanna Adores Dior

Plus, must-see looks from Kat Graham and others.

Tokyo Drift - Rihanna looks runway ready at the Christian Dior TOKYO Ready-To-Wear Show at The National Art Center in Tokyo. (Photo: Jun Sato/Getty Images for Dior)

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Rihanna - Rih is spotted at the Dior Fall 2015 Tokyo Show in a custom Dior denim dress and Resort 2016 booties, also by the designer. Making the brand look good is easy for her. By Jazmine A. Ortiz (Photo: Jun Sato/Getty Images for Dior)

Kat Graham - Who's black and white with stripes all over? Kat Graham, that's who! She brings her A-game to the photo call for Agent Carter during the 55th Monte Carlo Television Festival donning a strapless dress and matching blazer. (Photo: CRYSTAL, PacificCoastNews)

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Kat Graham - Who's black and white with stripes all over? Kat Graham, that's who! She brings her A-game to the photo call for Agent Carter during the 55th Monte Carlo Television Festival donning a strapless dress and matching blazer. (Photo: CRYSTAL, PacificCoastNews)

Garcelle Beauvais - The actress stuns in an orange and navy blue silk printed trench dress by Simply Intricate at the Girlfriends Getaway 2 premiere during the 2015 American Black Film Festival in NYC. Simply gorgeous! (Photo: Demis Maryannakis / Splash News)

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Garcelle Beauvais - The actress stuns in an orange and navy blue silk printed trench dress by Simply Intricate at the Girlfriends Getaway 2 premiere during the 2015 American Black Film Festival in NYC. Simply gorgeous! (Photo: Demis Maryannakis / Splash News)

Taraji P. Henson - Take a look at this red-and-black frock from RVNNYC the Empire star is working at the Monte Carlo TV Festival! (Photo: Pascal Le Segretain/Getty Images)

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Taraji P. Henson - Take a look at this red-and-black frock from RVNNYC the Empire star is working at the Monte Carlo TV Festival! (Photo: Pascal Le Segretain/Getty Images)

Angela Simmons - Angie stays slaying the streets of New York with her ultimate cool girl style. Her latest slay is in this PatBo dress and Schutz thigh-high caged heels. (Photo: Angela Simmons via Instagram)

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Angela Simmons - Angie stays slaying the streets of New York with her ultimate cool girl style. Her latest slay is in this PatBo dress and Schutz thigh-high caged heels. (Photo: Angela Simmons via Instagram)

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Zendaya - Z attends the Children Mending Hearts Empathy Rocks Fundraiser in a LAgence crepe maxi shirtdress. This 'fit is splurge worthy at $387. (Photo: Charley Gallay/Getty Images for Children Mending Hearts)

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Zendaya - Z attends the Children Mending Hearts Empathy Rocks Fundraiser in a LAgence crepe maxi shirtdress. This 'fit is splurge worthy at $387. (Photo: Charley Gallay/Getty Images for Children Mending Hearts)

Michelle Obama - The first lady makes her rounds in London promoting her Let Girls Learn Initiative in a custom Christopher Kane floral dress. Talk about jet-setting in style. (Photo: Jeff J Mitchell/Getty Images)

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Michelle Obama - The first lady makes her rounds in London promoting her Let Girls Learn Initiative in a custom Christopher Kane floral dress. Talk about jet-setting in style. (Photo: Jeff J Mitchell/Getty Images)

Laverne Cox - The Orange Is the New Black star attends the 2015 amfAR Inspiration Gala in New York in everyone's favorite go-to designer Michael Costello. (Photo: Neilson Barnard/Getty Images)

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Laverne Cox - The Orange Is the New Black star attends the 2015 amfAR Inspiration Gala in New York in everyone's favorite go-to designer Michael Costello. (Photo: Neilson Barnard/Getty Images)

Joan Smalls - Also at the amfAR Inspiration Gala, the top model is a goddess in Givenchy.(Photo: Neilson Barnard/Getty Images)

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Joan Smalls - Also at the amfAR Inspiration Gala, the top model is a goddess in Givenchy.(Photo: Neilson Barnard/Getty Images)

Hostess With the Mostest - NeNe Leakes strikes a pose with her fans while arriving at ABC studios to guest host Live! With Kelly and Michael in New York City. (Photo: PacificCoastNews)

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Nene Leakes - Here's a polished-casual look we absolutely love! The Real Housewives of Atlanta star waves at her fans while arriving at ABC studios to host Live! With Kelly and Michael wearing a blazer from her own fashion collection, white tee, jeans and Miu Miu metallic-toe sneaks. (Photo: PacificCoastNews)