Listen to Sia and Kanye West's upbeat collaboration "Reaper"

The track features on upcoming LP This Is Acting alongside "Alive" and "Bird Set Free".

Although the lyrics to "Reaper" are wounded and vulnerable, Sia and Kanye make an endearingly optimistic track. Much like Sia's "Chandelier", the pep of "Reaper"'s belies the gravity of the subject at hand.

Kanye is currently working hard on his next record SWISH, which will follow 2013's Yeezus. On New Year's Eve he dropped a new track called "FACTS", but it's unknown if that's gonna end up on the album.

This Is Acting is due out 29 January, and is a semi-concept record of songs written by Sia but intended for other artists.

Listen to "Reaper" below. It has been co-written and co-produced with Kanye.