Artists looking for a surefire pop anthem know that Sia Furler is the woman to call. She's penned some of today's biggest smashes — Beyoncé's "Pretty Hurts," Britney Spears' "Perfume," and Rihanna's "Diamonds" are just a few recents. She's also finally recognized as a solo hit-maker, despite having nearly two decades worth of work under her belt. Perhaps it's because of the success of her hit "Chandelier," but Furler's name is proudly announced when a track she worked on is released, with Kelly Clarkson's "Invincible" being her latest credit. The song itself is a mood-boosting track. Clarkson sings about breaking free from fear and finding courage through a broken heart. Her voice soars over cinematically booming drums. If you listen closely, you'll hear Sia in the backing vocals. There ain't nothin' like an empowering Kelly Clarkson song, is there? "Invincible" is the second song off Clarkson's forthcoming album Piece by Piece (out March 3).