Disney Releases the ‘Loyal Brave True’ Music Video from ‘Mulan‘. Multi-platinum and global award-winning superstar singer/songwriter Christina Aguilera performs the original song, “Loyal Brave True” in the new music video directed by “Mulan” feature director Niki Caro (“The Zookeeper’s Wife,” “McFarland, USA”). “Mulan” will begin streaming on Sept. 4 exclusively on Disney+