I like the way the two different styles of music are blended together in this song. For a while, I'd only seen a short clip of it and I thought, "I thought Avicii was an EDM (electronic dance music) guy, but this sounds basically like a folk song" and then I watched the whole video and it all clicked.
If you're wondering, the vocals are by Aloe Blacc, who I know from having a song that made the longlist for the Contrast Podcast Festive Fifty in 2010 for his song "I Need a Dollar". I don't believe that that song made the Festive Fifty, though. This song makes me want to investigate his discography.
ANYWAYS, here's the video!