updated 08/19/2010 AT 11:00 AM ET
•originally published 08/19/2010 AT 11:25 AM ET
The movie was enough of a treat, but the lucky Jonas Brothers fans who attended the Camp Rock 2: The Final Jam premiere in New York Wednesday got a whole lot more than that.
Following the screening at Lincoln Center’s Alice Tully Hall, Joe Jonas and Demi Lovato emerged for a surprise performance of the romantic duet “Wouldn’t Change a Thing,” from the movie’s soundtrack, with Joe’s brothers Kevin and Nick playing backup.
The impromptu concert was a hit, judging by the number of girls in the audience shrieking at the top of their lungs.