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 .

The Jonas Brothers brought all the Disney nostalgia to opening night of their 20th anniversary tour — with a little help from Demi Lovato. Nick, Joe and Kevin Jonas kicked off their JONAS20: Greetings from Your Hometown Tour at MetLife Stadium in New Jersey on Sunday,

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