Billie Eilish has teased her upcoming new single, ‘Happier Than Ever’.Eilish posted a 15-second clip of the new single in which she’s heard singing “When I’m away from you / I’m happier than ever…”Against an acoustic stripped-back guitar, Eilish is seen sat in a chair with her back to the camera before turning to face the screen.You can watch the clip here:Happier Than Ever pic.twitter.com/vaIbjfIvEb— billie eilish (@billieeilish) April 26, 2021Last week (April 21), Eilish teased that something