HIGH SCHOOL MUSICAL 2 WORLD PREMIERE - The cast of Disney Channel's "High School Musical 2" at Disneyland Resort's new "High School Musical 2: School's Out" attraction during the world premiere event. (DISNEY CHANNEL/ADAM LARKEY)KAYCEE STROH, ASHLEY TISDALE, OLESYA RULIN, VANESSA HUDGENS, ZAC EFRON, KENNY ORTEGA, MONIQUE COLEMAN