Today, Sia arrives with her latest track, "Unstoppable." The song is co-written by Christopher Braide and sounds like a synth-rock page torn right out of Demi Lovato's Confident book. It's the latest taste off her forthcoming album, This Is Acting, a project that is made up entirely of songs Sia originally wrote for other artists.

"Unstoppable" is the sixth song we've heard ahead of the album's release. Previously, Sia shared "Alive," "Bird Set Free," "Cheap Thrills," "One Million Bullets," and the Kanye West co-written and co-produced track, "Reaper." Listen to "Unstoppable" above. This Is Acting is out Jan. 29. You can pre-order the album now on iTunes and receive "Unstoppable" and five other songs instantly.