Take her out of the ball game! On June 10, Lady Gaga went to a New York Mets game, used Jerry Seinfeld's box seats, and showed all but nine fingers to an unappreciative (of her) crowd. Friday, it was on to Yankee Stadium! The Gagster - in fishnet stockings, unbuttoned Yanks jersey, lacy brassiere - somehow got into the Yanks' locker room, where superstuds shower. Reports said she swigged whiskey and groped her chest. (Why? No one else would?) Early, wrong rumors said Yanks co-owner George Steinbrenner wanted to ban her, but on Sunday Yankees GM Brian Cashman said Lady G is welcome - as long as she doesn't do icky things. What upset Cashman was not Gag's behavior - but the fact she invaded the sanctum after a loss. Only a matter of time before she descends on Citizens Bank Park and poor, unsuspecting Phillie Phanatic. That would be a bad romance. Roma-ma, Ga-ga ohh la la . . .