Super Bowl LI: A History of Super Bowl Halftime Performances in the Modern Era - ABC News
Sports poll: Should the national anthem be played before every sporting event or saved for big occasions? - The San Diego Union-Tribune
Country music star Luke Bryan to sing national anthem at Super Bowl LI
Super Bowl 57: How Long Was the National Anthem Last Year? - Bleacher Nation
Photos from Best Super Bowl National Anthem Singers
Watch Luke Bryan's snail-paced Super Bowl national anthem
Lady Gaga Wows at Super Bowl LI - The Observer
Super Bowl LII - Wikipedia
Here's Luke Bryan singing the national anthem at the Super Bowl, if you want to check that out
Lady Gaga Sings the National Anthem at Super Bowl 50
Veterans group's national anthem Super Bowl ad rejected by NFL - CBS News
Super Bowl 51: Patriots vs. Falcons, 2nd Half Open Thread - Dawgs By Nature
Complete List of National Anthem Performers at the Super Bowl
Colin Kaepernick's National Anthem Protest Spreads