The film starred Joe Jonas alongside his brothers Nick and Kevin, as well as Demi Lovato Joe looked at the camera and said, "Oh, oh," and cleared his throat before saying, "Read Camp Rock 3." Nick put down his glass of milk as he made a shocked face at the camera,

"We’ve been through so much together," the singer said of her fellow Disney Channel alums. "It was really, really great to spend time with them."

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 .