Popsugar Beauty Hair Billie Eilish With Green Hair Billie Eilish Has Slime Green Roots, and Now We Want to Be a Bad Guy, Too 8 July 2019 by Sarah Siegel View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Jul 6, 2019 at 8:41pm PDT Billie Eilish is a master of both hauntingly beautiful hits and unique hair colour choices. The "Bad Guy" singer just surprised us with a new look that is as unexpected as it is cool, just like her. The singer posted a photo of her new neon green roots to her Instagram. and we couldn't look away from the vibrant hue. The colour instantly brings to mind '90s Nickelodeon slime, which Eilish incorporated throughout the rest of her outfit. She frequently switches up her hair colour, but we hope this florescent hue sticks around for a while. Neon seems to be the celebrity beauty trend of the Summer, with celebrities like Rihanna wearing it on her nails and Lizzo wearing it on her eyes. Check out some of Eilish's previous hair colours ahead. Billie Eilish With Gray Hair View this post on Instagram A post shared by BILLIE EILISH (@wherearetheavocados) on Aug 18, 2017 at 4:56pm PDT 1 / 5 Billie Eilish With Silver Hair View this post on Instagram A post shared by BILLIE EILISH (@wherearetheavocados) on Dec 20, 2017 at 6:01pm PST 2 / 5 Billie Eilish With Blue Hair View this post on Instagram A post shared by BILLIE EILISH (@wherearetheavocados) on Jul 4, 2018 at 11:14pm PDT 3 / 5 Billie Eilish With Teal Hair View this post on Instagram A post shared by BILLIE EILISH (@wherearetheavocados) on Nov 6, 2018 at 3:01pm PST 4 / 5 Billie Eilish With Neon Green Hair View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Jul 6, 2019 at 8:41pm PDT 5 / 5 HairCelebrity BeautyBillie EilishBeauty NewsHair ColourCelebrity Hair