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 ...

"I've been wanting blonde for a while, I don't know what came over me," Billie Eilish said on The Ellen ... "I saw a fan-edit when I had green hair, it was me with whatever color hair I had ...