Sharon Stone: First Class Biatch

THERE'S a good reason why Sharon Stone had a first-class seat last Friday flying from New York to Los Angeles while her 9-month-old son, Laird, sat in coach with his nanny.

"First class was sold out," a spokeswoman explained. "She tried to get them seats in first class but couldn't, and she didn't want them on a separate plane."

Stone - whose "Basic Instinct 2" was savaged by critics and grossed a paltry $3.2 million its opening weekend - did venture back among the hoi polloi to visit her tot and to tell the nanny to keep him in his seat, for safety's sake, even if he wailed - which he did.

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