Harper McCoy, twelve, joins the school musical hoping to get past "dancer's block," but her Dance Starz teammates are not pleased, especially since they will soon compete against their biggest rivals, The Belles, in Regionals.

Actor, model, and New York Times bestselling author is best known for her work with Sia including the iconic music video “Chandelier” which has amassed nearly two billion views. Maddie’s film credits include The Book of Henry and Leap! and she has also made appearances on television shows such as Pretty Little Liars, Austin & Ally, and as the youngest judge on Fox’s So You Think You Can Dance. Maddie recently was cast in Steven Spielberg’s West Side Story.