AceShowbiz -

Jonas Brothers came to the Rumsey Playfield in Central Park on May 21 to kick off "Good Morning America" summer concert series. The three brothers performed a number of songs, including hit single "Burnin' Up" and "J.O.N.A.S!" theme song "LA Baby".

Joe Jonas, Nick Jonas and Kevin Jonas were also joined by their "Camp Rock 2: The Final Jam" cast Demi Lovato at the Friday gig. They delivered the TV movie's soundtrack "Can't Back Down" and were supported by several backing dancers.

In addition to those Disney Channel stars, the first day of "GMA" concert series also had the Jonas boys' security guard Big Rob coming to the stage. Serving as hosts who did not only introduce their performances but also chatted with them about some stuff were George Stephanopolous and Robin Roberts.

Among other things that they talked about with the band were the incident when Nick and his brothers got stuck in an elevator. Kevin said, "We did a show at The Grove in L.A. and right after that happened, we got stuck in the elevator for like an hour." Joe added, "Who panicked? I think we all had a moment where we were freaking out. -- I'm gonna avoid elevators for a little while. I'll take the stairs for now."

About their tour which will be held with the "Camp Rock" cast and kicked off on July 27 in Dallas, Texas, Kevin shared, "We have a blast, especially now because we're all going on tour. -- It's going to be a summer like no other."

As for Demi Lovato, this 17-year-old songstress who is currently becoming the spokesperson for Teens and Bullying Prevention urged fans to stop being mean. "I'm totally for it. No more mean girls," she said. The band couldn't agree more stating, "No more mean girls."

The next gigs of this concert series will feature Sugarland, P. Diddy, Norah Jones, Sarah McLachlan, Miley Cyrus, Alicia Keys, Mary J. Blige, The Go Go's, Sheryl Crow, Black Eyed Peas, Rihanna and Lady Antebellum. Additionally, Jonas Brothers and Demi Lovato will return to entertain the "GMA" audience on August 13.