Billie Eilish has shared a Christmas cover in the run-up to the holidays – watch her and Finneas‘ rendition of ‘Silver Bells’ below.The performance came as part of iHeartRadio’s 2020 Jingle Ball, where she also performed recent singles ‘My Future’ and ‘Therefore I Am’.Billie and Finneas’ version of ‘Silver Bells’ is a slow, stripped-back take on the classic festive track, played in front of a suitably Christmassy backdrop.Watch the performance below.The new Jingle Ball performance is the first