What did Billie Eilish wear to Grammys? Gucci oversized, green hair, vintage glamour.

Chartreuse-and-black oversized suit — the look that defined her Grammy debut sweep. See the complete what did Billie Eilish wear to Grammys guide on USA Celebs with looks, designers, and timeline context.

Black off-shoulder bodice, white skirt — Oscar de la Renta vintage Hollywood. See the complete what did Billie Eilish wear to Grammys guide on USA Celebs with looks, designers, and timeline context.

Vivid emerald dye paired with oversized anti-fit silhouettes. See the complete what did Billie Eilish wear to Grammys guide on USA Celebs with looks, designers, and timeline context.

Steamed Gucci jackets, vintage gowns, jewelry trays — precision before the carpet. See the complete what did Billie Eilish wear to Grammys guide on USA Celebs with looks, designers, and timeline context.