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AUG 29, 8PM
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Rihanna, Grammys

Jason Merritt/Getty Images

The Grammys may be the biggest night in music, but as a fashion show, it ain't too shabby either. Especially when you have couture all-stars like Rihanna, Katy Perry, and Beyoncé rocking the red carpet.

Which—you saw it—they did.

Adele's voluminous Valentino had tongues wagging, too, early in the night, while Ri-Ri stunned in a floor-length scarlet number by Alaia.

Beyoncé raised eyebrows by forgoing her usual skirts and dresses in favor of a pantsuit by Osman. Katy Perry let it all hang out—almost!—thanks to a keyhole-cut Gucci, and Jennifer Lopez flashed some Jolie-level gam...via a very, very high-cut Zuhair Murad.