Plot: John Lithgow hosts a two-hour event with Grammy-, Emmy- and Tony-winning performers, along with co-host Jordin Sparks on September 13 at 8 pm, live from Baltimore's harbor. Performers celebrating the 200th anniversary of our national anthem include Kristin Chenoweth, Melissa Etheridge, Denyce Graves-Montgomery, Little Big Town, Pentatonix, Smokey Robinson, Kenny Rogers, and Train