The Jonas Brothers welcomed Joe Jonas’ ex-girlfriend, Demi Lovato, onstage for a surprise performance at their first concert ...

Demi Lovato surprised fans by joining the Jonas Brothers during their first show on the "Jonas20: Greetings From Your ...

Joe, Kevin and Nick of the Jonas Brothers and Lovato starred in the 2008 Disney Channel Original Movie, Camp Rock, and it’s ...

Demi Lovato surprises fans by joining the Jonas Brothers at the Jonas20 anniversary tour opener for a “Camp Rock” reunion.

The band — consisting of brothers Joe, Nick and Kevin Jonas — kicked off their 20th anniversary tour on Sunday at MetLife ...

For Demi Lovato, reuniting with the Jonas Brothers at the kickoff show for the band’s 20th anniversary tour was “an instant ...

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

Lovato and the Jonas brothers performed renditions of “This is Me” and “Wouldn’t Change a Thing”, both of which featured in ...

Demi Lovato stole the show at the Jonas Brothers concert in a sage green Acne Studios look featuring a triangle bra top and ...

Reflecting on her recent surprise appearance at a Jonas Brothers' concert, the 32-year-old singer called the performance both ...

The Jonas Brothers have had multiple high-profile relationships over the years. In 2008, Nick Jonas dated Selena Gomez, while ...

Selena Gomez and Demi Lovato. Donato Sardella/Getty In addition to Cyrus, 27, Lovato said she is friends with Ariana Grande, who also rose to fame as a teen. Though Grande, 26, was on a different ...