A Sky Full of Stars

This song was recorded during the sessions for Ghost Stories with Avicii. The Swedish EDM artist was invited by Chris Martin to play the piano and his imprint can be heard on the song's majestic piano lines. Speaking with BBC Radio 1 DJ Zane Lowe, Martin, who usually tinkles the ivories on Coldplay's recordings admitted he felt like he was cheating on the band when he asked the Swede to play the piano instead of him.

Chris Martin said on Fuse: "What that song represents on Ghost Stories is the release after you've climbed the mountain - after you've done anything challenging. That's why that song is so unashamedly happy and danceable: because that's what it needed to be. I love singing it. I know we didn't break the mold, but it's just so fun to play."

A house-influenced piano-centric song with pounding bass drum, this is the closest Coldplay have come to recording a dance track.