Much like a butterfly emerging from a cocoon, a painfully shy 13-year-old girl took the stage on "America's Got Talent" Tuesday night, leaving the judges floored with her jaw-dropping performance. 

Courtney Hadwin could barely speak to judges Mel B., Heidi Klum, Howie Mandel and Simon Cowell, but then kicked it into high gear as she covered Otis Redding's "Hard to Handle" in the style of the Black Crowes. 

Prior to singing, all Hadwin could say was that she was "nervous," but Mel B assured her she would be fine. 

When "Hard to Handle" blared from the speakers, she began thrashing around the stage while belting out the song in her rich and soulful voice.

The judges were left stunned. 

"You are not from this era," Mandel said at the end of her performance. 

“You are absolutely amazing," host Tyra Banks added. "I’ve never seen anything like that."

Hadwin was later awarded the “Golden Buzzer” which propels her to the live shows. 

RELATED STORIES

'Real Housewives' Star Sports Tiny Purple Bikini as She Competes in Bodybuilding Contest

'American Idol' Contestant Kissed by Katy Perry Defends Singer, Introduces His Girlfriend

'Bachelor' Contestant Was Reported Missing Last Year, but There She Is on TV