Demi Lovato proved that she’s the real deal during a stellar performance of her hit song “Skyscraper” on America’s Got Talent’s semi-finals results show.

With a wall of flames behind her, the 19-year-old starlet belted out the powerful vocals leaving the crowd on their feet. The Sonny With A Chance star has had a busy week … recently celebrating her birthday with a trip to Disneyland.

Lovato checked out of rehab earlier this year due to an eating disorder. So glad to see the former Disney star back on the stage where she belongs.

Demi’s album Unbroken hits stores September 20.