The band — consisting of brothers Joe, Nick and Kevin Jonas — kicked off their 20th anniversary tour on Sunday at MetLife Stadium in their home state of New Jersey. But to make it more special, they surprised their fans with some special guests throughout the show, including Demi Lovato .

Joe Jonas and Demi Lovato reunited for a long-awaited Camp Rock reunion alongside Nick Jonas and Kevin Jonas for the opening night of the Jonas Brothers’ 20th anniversary tour at MetLife Stadium.

Demi Lovato wouldn't change a thing about her recent reunion with the Jonas Brothers. In an episode of Chicks in the Office posted Tuesday (Aug. 12) - two days after the pop star made a cameo at the Jo Bros' kickoff 20th anniversary tour concert in New Jersey - Lovato opened up about how "healing" it was to perform Camp Rock hits "This Is Me" and "Wouldn't Change a Thing" with former costars Joe,