Super Bowl 2019 prop bets: Full list including Gladys Knight National Anthem, coin toss, MVP, and more
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Gladys Knight sang 'brave' twice during Super Bowl national anthem, leading to prop bet chaos
One Of The Most Popular Super Bowl Prop Bets Became Shrouded In Controversy Thanks To Gladys Knight - BroBible
Gladys Knight causes Super Bowl prop bet controversy with rendition of national anthem
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Super Bowl national anthem: Over or under? Gamblers debate length of Gladys Knight's Star-Spangled Banner - CBS News
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Controversy over Gladys Knight's national anthem prop bet
Super Bowl 53: Gladys Knight explains her decision to sing the nationa
Gladys Knight To Sing The Super Bowl's National Anthem, As A Perilous Fight Endures : NPR