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ST. LOUIS (KSDK) - More fans than ever showed up at our NewsChannel 5 pep rally at Joe Buck's.

Heidi Glaus was there to capture a rare moment.

NewsChannel 5's Kelly Jackson usually sings loud and proud inside her car, but it's very rare for her to sing in front of an audience.

She rocked "Proud Mary" Monday afternoon with Butch Wax and the Hollywoods. It was the only time she took the stage, but the crowd went wild.