Monday: Sylvester Stallone, John Stamos and musical guest Shawn Mendes & Camila Cabello with The Roots. Tuesday: Kristen Stewart, Michael Shannon and musical guest Cage the Elephant. Wednesday: Billy Joel, who performs, and J.K. Simmons. Thursday: Mark Ruffalo and Kendrick Lamar, who performs. Friday: Tyler Perry, Wagner Moura and Iliza Shlesinger.