A year after the events of the previous film, Mitchie Torres (Demi Lovato) returns to Camp Rock, along with her friends and her boyfriend Shane Gray (Joe Jonas). On the way to Camp Rock, she and her mother Connie (Maria Canals-Barrera) notice that a new camp, Camp Star, has opened across the lake. Mitchie and her friends also notice that there are fewer campers than last year, and attempt to lift everyone's spirits at Opening Jam ("Brand New Day"). Camp Star sends parachutes to Camp Rock with chocolates and marshmallows, inviting them to a bonfire at their camp, but Brown (Daniel Fathers) is less than enthusiastic, as Camp Star's director is Axel Turner (Daniel Kash), whom he once kicked out of his rock band, the "White Crows".
Mitchie and the rest of the campers arrive at Camp Star, which seems to be much more flashy and sophisticated than Camp Rock. The bonfire starts and Luke (Matthew Finley) from Camp Star performs with several backup dancers ("Fire"). As the song ends, Dana Turner's (Chloe Bridges) bracelet flies from her hand and hits Nate (Nick Jonas) in the eye. Nate returns it after the bonfire and the two instantly feel a connection. Axel then offers the Camp Rock counselors jobs at Camp Star, doubling their salary, and encourages the Camp Rock campers to move to Camp Star. Very few campers switch, including Tess (Meaghan Martin), but many counselors move to Camp Star. Left with no staff, Brown decides to close Camp Rock, but Mitchie persuades everyone to not give up, and she and her friends take on the newly vacant counseling roles ("Can't Back Down").
Although things are tough at first, Mitchie and the rest of the counselors settle into their roles, and become determined to save the camp. They revisit Camp Star, and the two camps face off ("It's On"). Axel sees the showdown and suggests a televised competition between the two camps; Mitchie is reluctant at first, but eventually agrees after some persuasion from her friends, realizing it could gain Camp Rock the publicity it needs to stay open. However, Brown is angry, and tells Connie that he thinks that the competition is a trap in order for Axel to get back at him. Overhearing their conversation, Mitchie pours herself into making sure that they win the competition, which frustrates Shane, who has only returned to Camp Rock in order to spend more time with her ("Wouldn't Change a Thing").
The next day, Mitchie wakes up to find everyone rehearsing for the competition, thanks to Shane. He and his brothers motivate everyone to work harder ("Heart and Soul"). Mitchie and Shane then spend the day together ("You're My Favorite Song"), but Nate has trouble trying to tell Dana how he feels. He decides to sing instead and goes to Camp Star to serenade her ("Introducing Me"), gaining her affection, before being caught by Axel, who is her father. Later that night, Jason (Kevin Jonas) and the junior campers sneak into Camp Star, and spy on Luke and Tess performing. The night of the competition arrives, and Camp Star deliver a slick, stylish performance ("Tear It Down"); Brown finds out that Axel has been encouraging the public to vote for Camp Star through text messaging. All the members of Camp Rock then perform together, accompanied by a video montage of their summer ("What We Came Here For"), but Camp Star ends up winning the competition. Back at Camp Rock, everyone gathers at the bonfire for one last time ("This Is Our Song"), many members of Camp Star, including Tess and Dana, cross the lake to join Camp Rock, ensuring they have enough campers to continue for another summer.
NOTE: The film's extended edition features two performances that were not shown in Disney Channel's original airing of the film. First, before Luke's performance at the bonfire, Axel asks for volunteers to start the bonfire, and Mitchie and her friends perform "Different Summers". Also, when Jason and the junior campers sneak into Camp Star, Tess and Luke's full performance of "Walkin' in My Shoes" is shown, as only snippets were seen in the original airing.Demi Lovato as Mitchie Torres
Joe Jonas as Shane Gray
Nick Jonas as Nate Gray
Kevin Jonas as Jason Gray
Alyson Stoner as Caitlyn Gellar
Anna Maria Perez de Tagle as Ella Pador
Jasmine Richards as Margaret "Peggy" Dupree
Roshon Fegan as Sander Loyer
Jordan Francis as Barron "Barry" James
Daniel Fathers as Brown Cesario
Daniel Kash as Axel Turner
Maria Canals-Barrera as Connie Torres
Chloe Bridges as Dana Turner
Matthew "Mdot" Finley as Luke Williams
Meaghan Martin as Tess Tyler
Frankie Jonas as Trevor Kendall (Junior Rocker)
Arisa Cox as Georgina Farlow
Robert "Big Rob" Feggans as Oliver (Bus Driver)
The film was shot in Toronto, Ontario, from September 3, 2009 to October 16, 2009, filming the scenes at the French River, Camp Kilcoo, The Kingbridge Centre and Earl Bales Park.
On Rotten Tomatoes, the film has an approval rating of 40% based on 5 reviews and an average of 6.1/10. Some critics said that the film is the dance version of High School Musical and it did not compare to the previous film. Jennifer Armstrong from Entertainment Weekly enjoyed the film and called the performance of Demi Lovato, "dependently appealing".
The film garnered 7.9 million viewers on its premiere night, behind the predecessor's 8.9 million. However, it became the most watched cable television of the week, as well as the number 1 scripted cable television.
The film was released on DVD and Blu-ray on September 7, 2010 in the United States and Canada and was later available in worldwide. The film also includes the Extended Edition, the special feature Rock Along Edition and the Combo Pack, all available in DVD.
The Jonas Brothers Live in Concert was a concert tour by the Jonas Brothers with the cast of Camp Rock 2: The Final Jam and Demi Lovato as special guests. Roshon Fegan and Meaghan Martin both did not participate on the tour, due to their scheduling conflicts.