MGK and Skylar Grey Perform 'Invincible' at WrestleMania

Machine Gun Kelly provided the soundtrack for John Cena’s entrance at WrestleMania XXVIII at Sun Life Stadium in Miami Gardens, Florida, on Sunday. Following an introduction from his Bad Boy boss Diddy, the Cleveland rapper raged on stage with his WWE theme song “Invincible,” accompanied by a newly blonde Skylar Grey, who filled in for Ester Dean.

“That was seriously surreal…my mentor introduced me and we’re fighting for the underdog,” tweeted MGK after performing in front of millions.

Flo Rida also delivered his hits “Good Feeling” and “Wild Ones” as WrestleMania champ The Rock entered the ring.