It's a "Camp Rock" reunion for Demi Lovato and The Jonas Brothers.

The "Heart Attack" singer joined the trio on stage at the opening concert for the Jonas20 anniversary tour, at New Jersey's MetLife Stadium on Sunday, Aug. 10.

The Jonas Brothers brought out Lovato, 32, during their hometown concert to perform tracks from their hit 2008 Disney Channel film "Camp Rock," as well as its 2010 sequel. Lovato played Mitchie Torres in the movie, while Joe, Kevin and Nick Jonas played Connect 3, a fictional band based on themselves.

Joe Jonas, 35, whom Lovato briefly dated in 2010, performed "Gotta Find You" before the band brought out the actress to sing "This Is Me" and "Wouldn't Change a Thing."

Lovato came out in an olive bikini top and shimmering matching pants, as the crowd yelled in excitement and sang every word.

Joe Jonas told the crowd they hadn't performed the song for nearly 10 years, though Lovato added it "might have been longer."

The Jonas Brothers are marking the band's 20th anniversary this year with their recently released seventh studio LP, "Greetings from Your Hometown," and a 52-date tour across North America. The tour wraps at Mohegan Sun in Connecticut on Nov. 14.

Lovato recently released her new sultry track "Fast," from her upcoming unnamed dance-pop album.

This article originally appeared on USA TODAY: Jonas Brothers reunite with Disney pals Demi Lovato, Jesse McCartney for anniversary tour

Reporting by Taijuan Moorman, USA TODAY / USA TODAY

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