Billie Eilish is feeling green. The pop star, 17, debuted a brand-new beauty look on Sunday, posting a selfie to Instagram showing off her new neon green roots and brown hair pulled up into double ...

Neon green isn’t the easiest color to pull off, but on the “Halo” singer it absolutely glowed. She wore the color in a long sleeved mini-dress with a plunging neckline.