The song was done for the contest / commercial. Amazon has a full write up about this winning spot, but here is the excerpt about the song:
"After we assembled the 300 or so frames, [my boyfriend] Ithyle wrote some music to accompany the clip, and that same day Annie sent over some lyrics that just happened to fit perfectly."
http://www.amazon.com/gp/video-conte...tag=adtunes-20