Kelly Clarkson Debuts New Single 'Invincible,' Written By Sia

Kelly Clarkson Debuts New Single 'Invincible,' Written By Sia First she was "Stronger" and now Kelly Clarkson is "Invincible."



The "American Idol" alum released the second single off her forthcoming album "Piece By Piece" on Monday.



The uptempo track was written by Sia and showcases Clarkson's powerful vocals.



"I was so afraid, I felt so unsure/Now I am invincible, another perfect storm," Clarkson proclaims on the tune.







"Piece By Piece" goes on sale March 3.