The pop singer was front and center Sunday to belt out the "Star-Spangled Banner" ahead of kickoff, and despite some earlier concerns about being able to perform due to catching the flu ... P!nk killed it on the mic.
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As we reported ... P!nk was forecasting some potential trouble on Thursday during a rehearsal, saying she was praying she'd be able to get over some flu symptoms that were bogging her down.
Looks like she got over it and then some. On a side note ... no one appeared to kneel during her performance.