In 2006, high school musical with its Bobbie songs, silly story lines and a group of young Hollywood actors just started, in the world's 20 or 30 year olds and teenagers in the lead. Since the end of the movie, we have been watching the sky rockets of Zac Efron, Vanessa Hudgins and Ashley Tisdale win super honors, but none of us will forget the beginning of all this. Even if you have seen countless movies, you can still sing "pop top" without hesitation. Here are 15 facts you may not know!

1. High school musical script should not be the final name of the film, but it has not been successful in the process of shooting.

2。 Ashley Tisdale initially auditioned for Gabriella's role, but after being asked to audition for Sharpe, Ashley turned Regina George's role from that of a mean girl.

3。 When it comes to Sharpe, Tiara gold's role was originally offered to Selena Gomez, who refused.

4。 Troy Bolton's trademark in the three films is the invisible watch on his wrist.

5。 Even when he wasn't there, Lucas Graber learned the dance of "Gaelic in the game" because it was his favorite dance scene, and there was a jar where actors and crew could put money in if they were found yawning. At the end of the shoot, the money went to charity.

7。 School mascots were originally written for leopards, not wild cats.

8。 In the championship, a member of the Wildcats wore a jersey with "extra" on his back. Ha-ha.

9。 The creativity of high school musical comes from the 1999 play grease 3.

10。 The soundtrack of the first film is the best-selling album in the United States in 2006.

11。 At the end of "what time is it?" Zach came up with a signature dance step that could slide on the floor. East high school is a real school shooting, still in class for real students.

13。 Lucas Grabeel is working on blockbuster video before auditioning for HSM.

14。 Corbin blue chose number 8 as his jersey number because it's his favorite.

15。 the Knights of Stirling took part in the audition of Troy Bolton to Zach. A few years later, he played Zach's son in movie 17!