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Demi Lovato Rocks 'America's Got Talent'; Her Comeback Gigs Sell Out In Minutes (Video)

August 28th, 2011 12:00pm EDT

Demi Lovato

Teen star Demi Lovato blew the roof off America's Got Talent Thursday night with a performance of her comeback hit "Skyscraper."

The teen has sealed her comeback after her first shows since her personal meltdown last year sold out in a matter of minutes.

The singer/actress underwent three months of treatment for a series of emotional issues, including self-harming and an eating disorder.

She announced a trio of shows earlier this month, her first since she quit her South American trek with the Jonas Brothers in 2010.

And her fans proved they can't wait to see Lovato back on stage - the three gigs sold out in less than 15 minutes.

She took to her Twitter.com page to thank fans, writing, "Wow. THANK YOU GUYS!!!!!! I have the best fans ever ever EVER!"

Lovato will play two shows at the Hammerstein Ballroom in New York on September 17 and 18 and a third gig at the Nokia theater in Los Angeles on September 23. Demi Lovato AGT

Photo Credits: © NBC/Universal (video screenshot)