Björk is back! She has written a song especially for the forthcoming Moomins 3D movie Moomins and the Comet Chase called ‘The Comet Song’. The video for the song features live action from the film and can be viewed by clicking here! Photobucket 'The Comet Song’ is only available as a digital download from September 6th and all profits received by Björk and her record company partners will be donated the UNICEF childrens charities in Pakistan to help aid flood relief.