According to Simpsons wiki and upcoming Simpsons news Justin Beiber is set to guest star in tonight's all new simpsons episode. He will compete in a talent show with Bart and Bart will win defeatJustin and discover his true performing talents. I'm excited for this episode, I hope Justin is in more than just one scene. I bet there will be a lot of screaming girls crowding over Justin. Here comes an all new Simpsons!