Calvin Harris
When in doubt, wear black, and the DJ wears the old adage well. In a black tee shirt, jeans and leather bomber jacket, he looks comfortable and sleek. The white-soled kicks are a nice touch.
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Carrie Underwood
The singer dazzles in this chartreuse chiffon gown with silver beaded embellishment by Oriett Domenech. While the makeup, earrings, and clutch are pitch perfect, Underwood's hair pouf is a bit high (though, when in Vegas…).
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Iggy Azalea
The bodacious rapper has been more subdued on the red carpet as of late, and this Zuhair Murad gown is no exception. With the side-swept Veronica Lake wave in her hair, the Aussie beauty proves she can deliver Old-Hollywood glamour.
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Jennifer Lopez
J Lo is wearing a plunging neckline and high half-ponytail and all is right in the world. She sizzles in this Donna Karen number, its sheer aspect tempered by a leotard — another thing the former dancer knows her way around.
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John Legend
Polka dots and skinny jeans have never looked so refined. The crooner paired a micro-dot blazer with a matching print dress shirt, worn buttoned to the top with no tie. And the result is undeniably dapper.
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Josh Groban
Groban looks sharp in his navy two-button blazer, paired with a black dress shirt and slacks. The polka-dot pocket square and tortoise-framed glasses add a cosmopolitan vibe.
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Kesha
Kesha is stunning in this strapless, mermaid gown with a body-sculpting lace appliqué and tulle overlay. Looks like she removed the $ from her name and added it to her look.
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Nicki Minaj
The rapper wears an unexpectedly streamlined and glamorous gown by Alexander McQueen. She pairs the peek-a-boo number with light, natural makeup and gold cuffs. She's a pillar of fashion strength, except for the issue of fit–underboob is always a no-no.
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Ricky Martin
Looks like the Latin heartthrob has still got it in this two-button, shawl-collar tuxedo with a velvet lapel. Pairing a tux look with a skinny tie proves he is daring.
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Kelly Rowland
The singer looks sexy and cool in separates — a runway look that's made its way to the red carpet. And her layered gold bangles only amp it all up. Though she can certainly rock a crop top, a little less bust would have kept it a little classier.