Little Big Town sings the National Anthem (College National Championship)
Timer decided to stop right as they got started. Missed a few bars but here's what I could piece together.
Suggested videos

Little Big Town sings the National Anthem at Cardinals-Panthers Game
flyingh3adhigh · 2:18

Little Big Town ~ Orange Bowl Performance
L BTMedia (LBTMedia) · 1:03

Little Big Town Anthem Warm Up
L BTMedia (LBTMedia) · 0:39

Star Spangled Banner Little Big Town 02-18-12
USASSB4ever · 1:59

GMA Facebook Live with Little Big Town
L BTMedia (LBTMedia) · 2:54

WS2014 Gm3: Little Big Town performs national anthem
MLB · 2:13

The Chain - Little Big Town (feat. Brothers Osborne and Charlie Worsham)
L BTMedia (LBTMedia) · 4:13

National Anthem - Little Big Town
L BTMedia (LBTMedia) · 1:57

Little Big Town on the Boardwalk - Spotify
L BTMedia (LBTMedia) · 3:25

National Anthem LIVE July 4th 2016 with Little Big Town & The Boston Pops w\ Flyover
Jim W · 2:00

Military Honors at the Titans Game
L BTMedia (LBTMedia) · 1:06

Little Big Town: National Anthem-GA
babyblue1404 · 1:48