ET's own Canaan Rubin was also on hand for ET's coverage of the 'HSM 3' fan rally.

Watch as Canaan takes us behind the scenes with the frenzied fans, interviews other stars of the newest Highest Musical sequel and even plays basketball with one of them.  You can also get a sneak peak at Zach and Vanessa's prom costumes in Canaan's 'HSM 3' video blog.