The notable bands on your television this week include: Fall Out Boy (Kimmel; 9/18), Jason Isbell (Kimmel; 9/19), Kacey Musgraves (Fallon; 9/20), Billie Joe Armstrong (Fallon; 9/22), The Killers (Colbert; 9/21), Sir Sly (Corden; 9/19), Kesha (Ellen; 9/22).