Best new songs today: Billie Eilish and Rosalía, Emma Ruth Rundle & Thou...

Billie Eilish and Rosalía release their dramatic pop ballad 'Lo Vas a Olvidar'; Emma Ruth Rundle & Thou follow their last year's debut collaboration with a new EP - 'Orphan Limbs' is the stand-out track from it; Forhist of Blut Aus Nord shares a sympho/black-metal song 'II'; Vast Aire of Cannibal Ox bites hard on 'Good Fuel'; NYC rapper Marlon Craft releases a melancholic albeit determined political song 'State of the Union'.