The 10 facts you never knew about High School Musical...

'High School Musical’ first premiered on the Disney Channel back in 2006 and became a phenomenon that made stars of Zac Efron, Vanessa Hudgens and Ashley Tisdale and spawned two sequels, a spin-off and a television show. But how much do you know about the smash hit franchise?

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'High School Musical’ first premiered on the Disney Channel back in 2006 and became a phenomenon that made stars of Zac Efron, Vanessa Hudgens and Ashley Tisdale and spawned two sequels, a spin-off and a television show.

But how much do you know about the smash hit franchise?