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Meredith Vieira curses on live TV

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Meredith Vieira, who has been filling in for Kathie Lee Gifford on “Today” accidentally dropped the s-bomb this morning.

The former “Today” co-host dropped one of her interview cards just before the segment resumed from a commercial break in the show’s fourth hour.

Vieira said “oh sh*t” before covering her mouth and gasping – clearly realizing she had sworn on TV.

Co-host Hoda Kotb apologized, as did Vieira several times, for the incident.

“Oh, my gosh, I’m so sorry, I’m so sorry,” Vieira said several times.

Al Roker celebrated Vieira’s slip laughing and throwing his hands up in the air saying “Yes, Yes.”

This isn’t the first time Vieira has cursed on TV. In 2010, she was filming a segment about a driving simulation and let the curse word fly after crashing.