Watch Gladys Knight Sing the National Anthem at Super Bowl 2019
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Gladys Knight defends singing national anthem at Super Bowl - BBC News
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Gladys Knight's national anthem performance before Super Bowl 2019: VIDEO - 6abc Philadelphia
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Super Bowl 2019: Gladys Knight causes prop bet controversy with anthem
Gladys Knight Defends Decision To Perform National Anthem At Super Bowl
Gladys Knight defends singing national anthem at Super Bowl - BBC News
NFL Super Bowl 2019: Gladys Knight anthem prop bet controversy