Heartland will sing the national anthem Sunday (Oct. 1) prior to the NASCAR Banquet 400 in Kansas City, Kan. The performance will air on NBC at 1:30 ET. Heartland's single, "I Loved Her First," is currently No. 3 on Billboard's country singles chart. ... Meanwhile, Big & Rich will perform the anthem before the Dallas Cowboys-Tennessee Titans football game Sunday. The game will air regionally on Fox at 1 p.m. ET from LP Field in Nashville.