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

The star, known for her edgy red carpet ensembles, arrived at the ceremony in a simple black look Bailey Richards ... Kevin Mazur/Getty Billie Eilish and the red carpet go together like birds ...

and a black Prada sailor hat. Her dark hair was styled in a low bun, with face-framing layers. Keeping her look minimal, she opted for natural nails and subtle makeup. Eilish was accompanied by ...

With an epic surprise collaboration — two Billies: Billie Joe Armstrong and Billie Eilish ... Graham Nash, Green Day, John ...

Billie Eilish ... black and gray patterned button-down shirt, flared trousers and bucket hat. And for the 2020 show — her history-making Grammys debut — the singer donned a glimmering green ...

Billie Eilish ... black Chrome Hearts sunglasses, and a black Prada sailor hat. Her dark hair was styled in a low bun, with face-framing layers. Keeping her look minimal, she opted for natural ...