Gladys Knight explains decision to sing at Super Bowl
Gladys Knight criticized for singing national anthem at Super Bowl
Gladys Knight, Ahead of Super Bowl Anthem Date, Criticizes Colin Kaepernick - The New York Times
Ouch! Gladys Knight Slammed By Fans For Accepting Super Bowl National Anthem Gig - That Grape Juice
Gladys Knight criticized for singing national anthem at Super Bowl
Gladys Knight defends singing national anthem at Super Bowl - BBC News
Gladys Knight's 'class act' national anthem at Super Bowl
Grammy viewers slam Motown tribute for featuring Jennifer Lopez and not a black singer
Gladys Knight is 'healthy' despite comments that she had the 'same HD wallpaper