The pair sang "This Is Me" and "Wouldn't Change a Thing," 17 years after the Disney Channel original movie was released.

The Jonas Brothers already had fans feeling nostalgic with their new tour and then they raised those stakes with their first ...

The Jonas Brothers kicked off their JONAS20 tour with a show at the MetLife Stadium in New Jersey on Sunday, Aug. 10 ...

Demi Lovato joined the Jonas Brothers onstage for the opening night of their tour at MetLife Stadium in New Jersey.

For Demi Lovato, reuniting with the Jonas Brothers at the first show of the band's 20th anniversary tour on Sunday night was ...

Joe Jonas and Demi Lovato performed 'Camp Rock' favorites during the Jonas Brothers' 20th anniversary tour at MetLife Stadium ...

The Jonas Brothers brought out Disney co-star Demi Lovato as a surprise guest at their New Jersey stop for their "JONAS20" ...

Disney fans assemble! Demi Lovato and Joe Jonas reportedly reunited for a nostalgic performance at Jonas Brothers’ MetLife ...

Demi Lovato surprised fans by joining the Jonas Brothers during their first show on the "Jonas20: Greetings From Your ...

Joe Jonas and Demi Lovato learned quickly that they were better off as friends. Jonas and Lovato first connected early in ...

Joe Jonas and Demi Lovato reunited for a long-awaited Camp Rock reunion alongside Nick Jonas and Kevin Jonas for the opening ...

Lovato joked at Sunday's (Aug. 10) show at MetLife Stadium in New Jersey that it "might have been" more than a decade since ...