Photos by Janie Willison Perhaps best known for her hilarious portrayal as Glinda in Broadway's Wicked, Carrie St. Louis has mastered the art of musical comedy. She first made her Broadway debut in Rock of Ages in 2014 after graduating from the University of Southern California, and she soon landed that coveted audition for the blonde witch in Wicked's National Tour. With her charm and skill in tow, St. Louis was cas…