Griff has debuted her upcoming single ‘Astronaut’ which she collaborated with Coldplay‘s Chris Martin on.The singer played the song at her first sold-out headline show at EartH in London following a run of festival appearances and stadium shows as opening support for Coldplay and Ed Sheeran. She used the intimate gig to showcase her upcoming project.Per The Line of Best Fit, Griff played ‘Astronaut’, a track that will be released early next year.