Billie Eilish reveals she's been hiding her blonde hair for months ANI | Updated: Apr 04, 2021 13:25 IST Washington [US], April 4 (ANI): American singer-songwriter Billie Eilish recently debuted her new highlighted hair and the singer has revealed now that she had been keeping her hair transformation under wraps since mid-January. According to People magazine, the 19-year-old singer uncovered the mystery about her new hair tone during a casual Instagram Q&A session on Saturday (local time). The 'Bad Guy' crooner addressed various fan inquiries concerning her new haircut -- including why she had been staying quiet about it for such a long time.