Older, and maybe wiser, five of the stars of High School Musical will reconvene Wednesday at 8 p.m. ET on the Disney Channel for the tenth anniversary celebration of the little TV movie that reached 100 million different viewers around the world in 2006 (before Internet streaming), won a boatload of awards, and was performed by students in more than 2,000 U.S. schools in its first 15 months. Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel, Corbin Bleu and Monique Coleman, who have had their share of growing pains, will talk about the show. Zac Efron, who emerged as the biggest star, joins with a taped segment. Here’s the HSM’s big finale. (They look like such babies.) -- Jonathan Storm