Popsugar Beauty Nails Billie Eilish Neon Green Nails Billie Eilish's Nails and Hair Are Now Both Summer's Biggest Hue 11 July 2019 by Sarah Siegel First Published: 9 July 2019 View this post on Instagram A post shared by camila (@camila_cabello) on Jul 8, 2019 at 9:15pm PDT Image Source: Getty / Rich Fury We bet we know what Billie Eilish's favourite colour is — it's now in her hair and on her nails. Over the weekend, Eilish revealed that she had dyed her roots neon green, and thanks to a photo posted by Camila Cabello, we now know she's also wearing the colour on her nails. The singer is seen in the photo alongside Cabello with a monochromatic green look in which she matched her outfit, hair, extra-long stiletto nails, and sunglasses. It's clear from a quick scroll through Eilish's Instagram feed that she's going full-force on Summer's biggest trend. Check out Eilish's love affair with the colour, ahead. Billie Eilish in Neon Green View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Jul 6, 2019 at 8:41pm PDT 1 / 5 View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Jun 4, 2019 at 11:36pm PDT 2 / 5 View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Apr 26, 2019 at 6:55pm PDT 3 / 5 View this post on Instagram A post shared by BILLIE EILISH (@billieeilish) on Oct 30, 2018 at 9:11pm PDT 4 / 5 View this post on Instagram A post shared by camila (@camila_cabello) on Jul 8, 2019 at 9:15pm PDT 5 / 5 NailsCelebrity BeautyBillie EilishBeauty TrendsBeauty NewsCelebrity NailsManicure