Well, what a nice surprise this was! Ellie Goulding put her own spin on British rock band Alt-J's hit, "Tessellate," and the song is nothing short of amazing. It's much unlike anything we've heard from the UK singer in quite some time - more acoustic and less electronic influences. Chiddy Bang producer Xaphoon Jones crafted a very simple backdrop for her to shine, adding in a killer sax solo and infectious drums. Hopefully her new album will have more sounds like this!