The band is all here.

Exes Joe Jonas and Demi Lovato stunned fans when they reunited for a “Camp Rock” performance in New Jersey on Sunday.

Joe, who played pop star Shane Gray in the 2008 Disney Channel musical, sang “Gotta Find You” as he and brothers Nick Jonas and Kevin Jonas kicked off their 20th anniversary tour at the MetLife Stadium in East Rutherford over the weekend.

He then invited Lovato, who portrayed Mitchie Torres in the movie, to join him onstage.

The “Sorry Not Sorry” singer, 32, and Joe, 35, went on to perform the “Camp Rock” tracks “Wouldn’t Change a Thing” and “This Is Me.”

After wrapping the latter, the DNCE frontman told the screaming crowd that he and Lovato hadn’t performed the track for “almost 10 years” — and she claimed it “might have been longer.”

The “He

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