WATCH: Little Big Town Does Amazing National Anthem Sunday Night [VIDEO]

The best harmonies from Nashville on earth were on hand at the Carolina Panthers-Arizona Cardinals game in Charlotte, NC, Sunday evening to sing the National Anthem. Little Big Town is no stranger to singing the Star Spangled Banner and proved again why the reigning CMA Vocal Group of the Year is just that.

The foursome is out on the road with Luke Bryan and Dustin Lynch for the 'Kill The Lights 2016' tour.