Jonas Brothers concertgoers were pleasantly surprised on Sunday evening, when Demi Lovato reunited with her ex-boyfriend Joe Jonas right on stage.

The 32-year-old singer made a surprise cameo as Joe, 35, performed with his brothers Kevin, 37, and Nick, 32, as the musical trio kicked off their 20th anniversary tour in New Jersey at MetLife Stadium.

The brothers – who on Thursday came out with Greetings From Your Hometown, their seventh studio album – played the song Gotta Find You and from the Disney Channel movie Camp Rock.

Lovato emerged to huge applause and joined the brothers on the tracks Wouldn’t Change a Thing and This Is Me, 17 years after Camp Rock’s June 2008 debut and about 15 after its sequel Camp Rock 2: The Final Jam hit the air.

Lovato subsequently took to Instagram to advertise her unlikely collaboration with her ex, saying that they made musical ‘history’ with the outing, some 15 years after they dated in 2010.

She captioned a reel of the pair together, ‘For the history books,’ tagging into the post her ex Joe, who went on to have two daughters with ex-wife Sophie Turner, 29 – Willa, four, and Delphine, two.

Jonas Brothers concertgoers were pleasantly surprised on Sunday evening, when Demi Lovato, 32, reunited with her ex-boyfriend Joe Jonas, 35, on stage in New Jersey at MetLife Stadium, where she performed on a pair of songs

Lovato captioned a reel of the pair together, ‘For the history books,’ tagging Joe into the post

The Cool for the Summer songstress since May has been married to musician Jordan Lutes, 34, who she was seen passionately kissing in an elevator in an Instagram Stories pic posted late Sunday.

Lutes did not mind seeing his wife reunite with her ex-boyfriend onstage, as he showed support for his spouse via multiple Instagram posts.

In the thread of the comment section adjacent to Lovato‘s reel, Lutes posted three hysterical emojis and four emojis of clapping hands, signaling his love for Lovato amid the high-profile outing.

Lutes also took to Instagram Stories to say that he ‘couldn’t be more proud’ of his spouse.

Lutes captioned a clip of his wife heading to the stage to perform: ‘I love you soooo much baby.’

Another Camp Rock star on hand at the concert Sunday was Anna Maria Perez de Tagle, who portrayed the character Ella in the two movies.

Perez de Tagle joined Franklin Jonas to host a Samsung TV Plus livestream of Sunday’s proceedings.

Franklin, 24, joined his older siblings onstage, along with their parents, to finish the two-and-a-half hour show with the 2007 track When You Look Me In the Eyes.

Joe and Demi shared an embrace on the stage during Sunday’s concert from New Jersey

Lutes did not mind seeing his wife reunite with her ex-boyfriend onstage, as he showed support for his spouse via multiple Instagram posts

The Cool for the Summer songstress since May has been married to musician Jordan Lutes, 34, who she was seen passionately kissing in an elevator in an Instagram Stories pic posted late Sunday

The brothers said in a statement prior to Sunday’s Samsung TV Plus livestream: ‘We’re always looking for fun ways to surprise our fans, jumping on the ferry and turning it into a show just felt like the perfect New York moment.

‘You never know what’s going to happen in this city, one minute you’re on your way somewhere, the next there’s a concert happening on your commute.’

The musical trio appeared on The Tonight Show Starring Jimmy Fallon Friday, where they said fans could expect a mix of solo and group tracks on the tour setlist.

‘There’s so much music to play,’ said Kevin. ‘The setlist is hard to build, right?

Lutes said he was very proud of his spouse as she made a well-received cameo

Lovato emerged to huge applause and joined the brothers on the tracks Wouldn’t Change a Thing and This Is Me

The entertainers reunited on the East Coast more than 17 years after Camp Rock’s 2008 debut

‘But at the same time it’s so fun because we do get to take breaks and admire each other’s work at the same time.’

Joe said, ‘And pee breaks mostly!’

Nick said on the talk show that curating the anniversary tour proved a challenging task, as it’s ‘basically impossible to summarize a 20-year journey with music.

‘What we feel we’ve come to is something that really represents the journey we’ve been on and the songs that are relevant to us and those steps in our career in different moments.’

Nick foreshadowed Lovato’s outing in saying, ‘We’ve got some amazing special guests lined up and I just can’t wait.’