Invincible by Kelly Clarkson

"Invincible" is a song by American singer Kelly Clarkson from her seventh studio album, Piece by Piece (2015). It was written by Sia, Jesse Shatkin, Steve Mostyn, and Warren "Oak" Felder. Produced by Shatkin, the track is an orchestral synthpop anthem about self-empowerment. "Invincible" features uncredited vocals from Sia, as well as string arrangements by Oliver Kraus. It was first released as the first promotional single from Piece by Piece on February 23, 2015, but then issued as the album's second single to Hot Adult Contemporary radio stations on May 18, 2015 through RCA Records.