An American Girl: Saige Paints the Sky (2013)

Synopsis

Saige Copeland is a talented artist who loves horses. She's pumped up about the new school year and seeing her best friend Tessa. But that changes when Tessa seems to be hanging out with another girl and when art class is cut. Saige, now trapped, goes to her grandmother for help and takes action. Saige now must face her fear and overcome her stage fright. Can Saige let go of her fears and her jealousy to shine bright and regain her friendship with Tessa?