I listened to BBC Radio 1's Internet takeover I think, where they played music from their Big Weekend. The first song was It's time from Imagine Dragons and that reminded me of a cover of this song, that I discovered on Youtube once. It's from Peter Hollens and Tyler Ward and it's basically made without any instruments, except human voice and some clapping. And it sounds really amazing. I can't really decide if I prefer this version to the original or not... I probably do though.