After all, can you think of a more perfect coupling? No joke, but this snippet of the Kanye West-penned "Reaper" low-key has us dying. Listen to the preview below. Sia's This Is Acting is out tomorrow. NEW SONG: "Reaper" co-written & co-produced by @kanyewest. Drops 1.7.16 #ThisIsActing - Team Sia pic.twitter.com/wcdplrN458 — sia (@Sia) January 5, 2016