Billie Eilish is sharing why she hid her bleach blonde hair.The 19-year-old singer showed off her new hair color last month, also revealing that her former black-and-green look was actually a wig. On Saturday, Eilish answered a couple of fan questions, which included one that asked, «Why did u hided [sic] your blonde hair?»"'Cause it took six weeks to accomplish…" the «Bad Guy» singer replied, also posting a photo from Jan.