UNDATED (CNN) -- Celebrity Nick Lachey tweeted he was kicked out of Qualcomm Stadium in California Sunday and "couldn't be prouder."

The singer was there supporting the Cincinnati Bengals against the San Diego Chargers.

He tweeted he was not kicked out for "trash talking." He wrote someone turned around, put their finger in his face, called him crazy, so he reacted.

Meanwhile, TMZ posted a video it says shows Lachey getting aggressive with a Chargers fan.

It quotes the man as saying Lachey grabbed him by the throat and shoved him to the ground.

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