The notable artists on your television this week include: Mastodon (Kimmel; 4/3), Cold War Kids (Kimmel; 4/5), Father John Misty (Colbert; 4/4), Craig Finn (Meyers; 4/3), Michelle Branch (Meyers; 4/6), Zara Larsson (Corden; 4/4), and Demi Lovato (Corden; 4/5).