After wrapping their performance of "This Is Me," the DNCE frontman told the screaming crowd that he and Lovato hadn't performed the track for "almost 10 years."

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

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