Downloading lists of songs without context (or even pictures) can lead to some odd things happening. I listened to this a good ten times on the subway and thought Shamir was (a) a girl and (b) English. It was only when I saw the video that I realised I was wrong.
As to why / how it’s at #1 here, that should be pretty self-evident. It was a bit of a lean year, good ideas were generally winding down. I’m not saying this is hugely original, but it stands out more than anything else.