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Twelve days after Lady Gaga wound up in his box at Shea Stadium during a Mets game, Jerry Seinfeld has called her "a jerk" and then some.

Joking or no? Read and decide.

"This woman is a jerk. I hate her," Seinfeld said during a WFAN radio interview on Monday. "I can't believe they put her in my box, which I paid for."

Gaga, dressed in a bra and swilling beer,  was moved from her front row seat to Seinfeld's empty box (without his knowledge) after flipping off photographers.

"You give people the finger and you get upgraded? Is that the world we're living in now?" he said.

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Seinfeld first said when asked about the June 10th incident, "I wish her the best. You take one 'A' off of that and you've got gag."

"I don't know what these young people think or how they promote their careers," Seinfeld said. "I'm older, I'm 56. I look at Lady Gaga the way Keith Hernandez watches these kids when they pull the pocket out, they wear the inside-out pocket. ... Do you think he understands that? He can't understand that. That's a new game, that's kids."

He added, "I'm not one of these all-publicity-is-good people. People talk about you need exposure -- you could die of exposure."