The decibel level soared in London last night when High School Musical 3: Senior Year held its UK premiere in Leicester Square. The latest instalment in the popular franchise sees school sweethearts Troy and Gabriella faced with the dilemma of being separated as their time at Easy High draws to a close. DS managed to grab stars Zac Efron, Vanessa Hudgens and Corbin Bleu at the premiere to chat about the upcoming Disney movie.