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

Billie Eilish just shut down the haters who have a problem with her signature neon green hair. The "Bad Guy" singer-songwriter, 19, who's become known for rocking the statement-making lime green ...

There is no one cooler than Billie ... green and black (the brand also sells it in red and navy). To make the look suitable for the cold New York City weather, I layered a gray long-sleeve T-shirt ...

Chris Hemsworth revealed that he regretted taking a selfie with Billie ... shirt as Patasky wore a bedazzled white dress with cutouts along the waist. Hemsworth, 41, presented that night as Eilish ...

Some YouTubers have been filming themselves pretending to be Billie ... her green roots, oversized clothes and sunglasses — in order to trick people into thinking they are Eilish.