Eilish, 23, rocked a black top with black pants and a white collared undershirt while walking the Grammys red carpet. She accessorized with tiny black glasses, a black sailor hat and black shoes. For beauty, Eilish's makeup was subtle and natural, with her striking blue eyes peeking out from above the glasses.

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She wore a tailored black jacket atop an untucked white button-up shirt, black slacks and matching dress shoes.