 Coldplay, along with Beyoncé, Ed Sheeran and Pearl Jam, headlined the festival, which was broadcast on NBC in the US on 27 September and the BBC in the UK on 28 September.Speaking on Nick Grimshaw's "Radio 1 Breakfast Show" on the BBC on 6 November, Coldplay confirmed 4 December as the release date of "A Head Full of Dreams", and a new song from the album, "Adventure of a Lifetime", premiered on the show.The album features guest appearances from Beyoncé, Gwyneth Paltrow, Noel Gallagher, Tove Lo and Barack Obama.