Sia's new album is due out this year.
It's called 'This Is Acting' and all the songs on it are songs that Sia had written for other artists, but they didn't want them.
Like her new song 'Reaper' which Sia originally written (alongside Kanye West) for Rihana.
Sia has even said in an interview that she doesn't really like the song because she can't connect with it but we think it's going to be a hit!
Check it out for yourself below!