With a little over a week left until the arrival of her "This Is Acting" album, Sia Furler premiered another new song off it as a preview. She dropped on Thursday, January 21 the empowering tune called "Unstoppable" which, just like other tracks making up the LP, was originally penned for and rejected by another artist, AceShowbiz reports.

On it, Sia encourages her weak self to "put my armor on" and "show you how strong how I am." She then adds in the chorus, "I'm unstoppable/ I'm a Porsche with no brakes/ I'm invincible, I win every single day/ I'm so powerful I don't need batteries today/ I'm so confident that I'm unstoppable today."

"This Is Acting" is coming out on January 29 as a follow-up to 2014's "1000 Forms of Fear" that gave Sia her first No. 1 album on Billboard 200. The forthcoming set will also feature previously-released cuts like "Alive", "Bird Set Free", "One Million Bullets", "Cheap Thrills" and the Kanye West-produced "Reaper".