High School Musical 2: School's Out
From Disney's Hollywood Studios Wiki
This attraction usually took place in front of the Sorcerer's Hat on Hollywood Boulevard, but is performed on the Streets of America if the area in front of the hat is needed for one of the parks many Special Events.
This attraction ran from September 24, 2007 to September 13, 2008. It was preceded by High School Musical Pep Rally, and proceeded by High School Musical 3: Senior Year - Right Here! Right Now!.