Burbank, May 21, 2007 . . . Radio Disney will world premiere "What Time Is It," the first song from the highly anticipated Disney Channel Original Movie "High School Musical 2," on FRIDAY, MAY 25 at 8:00 a.m. ET, during Radio Disney's Planet Premiere feature.  The anthem, written by Matthew Gerrard and Robbie Nevil, will be highlighted throughout the day, airing once during each airshift.  It features Zac Efron, Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel, Corbin Bleu and Monique Coleman, the cast of the sequel which is set to debut Friday, August 17 on Disney Channel.