Billy Joel is quite the chick magnet. The "Piano Man" was walking uptown after lunch with a pal the other day when a young, tanned temptress took his elbow and began walking with him. Joel shared a quick laugh with the brown-haired beauty - but kept his hands to himself, safely tucked inside his jacket pockets. "Billy didn't even know her name. She just came up to him, said she was a fan," said a representative for Joel. "He thinks she said she was from Lebanon. He said she was very nice and charming."

Billy Joel stood by his ex-wife, Christie Brinkley, as she battled fourth husband Peter Cook in divorce court. What makes Billy's allegiance remarkable is that, according to a former nanny, Christie put Billy through a similar hell.

Cook and Brinkley have officially reached a settlement, but he's continued to charge that she's trying to turn their children - their daughter, Sailor, and Brinkley's son with Rick Taubman, Jack - against him.

That's why Cook is cheered by the delivery of some fresh dirt on Christie, courtesy of Alzirene Vianna, who looked after Billy and Christie's daughter, Alexa Ray, from June 1993 to December 1994.

In 1995, when Billy and Christie were still dealing with matrimonial issues, Vianna gave Billy's lawyers an affidavit, which we've obtained.

Vianna alleges in the never-aired 40-page statement that:

"Christie never encouraged Alexa to call Billy" and told Vianna to eavesdrop on phone conversations Alexa had with Billy. When Vianna took Alexa for a visit with Billy, Christie told Vianna to let her know if Billy was drinking again. "I want you to spy for me," Vianna quotes Christie as saying.

After Christie had left Billy for handsome Colorado businessman Taubman, she was packing her bags for Telluride when Alexa, then age 8, started "acting up." "Christie told her in a very harsh tone that if she wanted to come with her to Colorado...she would have to stop behaving like this, because she didn't want Alexa to ruin her relationship with Ricky."

It wasn't long before Christie and Rick were getting into arguments: "Ricky would... kick furniture and slam doors." Once, while staying at a hotel in California, Rick wouldn't let Christie into their room. "Christie started pounding on the door and kicking it... Rick later told Christie: 'No wonder Billy left you; who can live with you?'"
Once, while Rick was getting into a car outside their house, "Christie opened a window, threw something and said, 'Fuck you, you asshole!'"

People began to talk about "Christie's addiction to prescription drugs." Said Vianna: "I remember going to the pharmacy every day in East Hampton to get several prescriptions filled for Christie Brinkley."

Christie wouldn't grant Alexa's wish for Billy to come to school events. Alexa sobbed when she said goodbye to Billy after a visit and "seemed to withdraw."

Gary Smith, a spokesman for Cook, says Vianna's tales of "parental alienation and interference...unfortunately continue to this date and come as no surprise to Mr. Cook."

Brinkley's lawyer, Loren Plotkin, calls Vianna a "disgruntled employee," adding: "Christie, Billy Joel and Alexa Ray deny these baseless, false and malicious allegations. ...One must question the motive of the individual who dredged up this document as nothing more than a shameful, transparent and ultimately fruitless attempt to hurt Christie and her family."