Skincare and fitness enthusiast Christie Brinkley apparently owes the IRS $531,720, as the agency recently placed a lien for the same amount on Brinkley's $30 million home in Bridgehampton. "Financially, her accounts are in good shape. This must be some kind of accounting screw up," a source close to Brinkley tells the Post. We've all been there: Whoops! We forgot to pay $500K in taxes, and we haven't watered our ficus in weeks. more ›

John McCluskey pleaded not guilty today to second-degree harassment charges for his Hamptons altercation with Rudy Giuliani this weekend, but did go ahead and sign an order of protection saying that he would leave Giuliani and wife Judith Nathan alone. McCluskey did not bring a lawyer to court today, telling reporters, "Why would I dignify this with a lawyer? I think it's so frivolous." Both sides accuse the other of elevating the spat into physical threats—police reports say that when McCluskey was being taken away as he said to cops, "I didn't know that scumbag still has so much power out here...I have the right to speak my mind and tell him how evil he is...You all will regret this." McCluskey might have to think about dignifying the incident with a lawyer pretty soon—he'll need one to show up in his place at the next court date in June. He told a judge that he won't be there since he's leaving the country to film a documentary. more ›

Rudy Giuliani and wife Judi Nathan were enjoying the holiday weekend in the Hamptons yesterday when a publishing executive got in the face of the former mayor and gave him a little more than a piece of his mind. After stepping out of a Presbyterian church where he was attending an art fair, 69-year-old John McCluskey confronted the Giulianis on a Bridgehampton street, poked his finger in Rudy's chest and uttered a sentiment more than a few New Yorkers share, "You're the worst person in the world and I'm going to punch you out!" more ›

Madonna's publicist is saying that the pop singer was tossed from a horse because paparazzi jumped out of the bushes and startled the 50-year-old Material Girl and her horse. The Post reports that she "was leaping over hurdles on a brown steed" at friend Steven Klein's Bridgehampton horse farm" (the Post also has photos). She suffered minor injuries and bruises but will need other tests and observation; according to the Daily News, she is "recovering at friend Gwyneth Paltrow's Amagansett estate." In 2005, Madonna broke her collarbone after falling from a horse on her British estate, an experience she called the "most painful" of her life (it may have also led to the demise of her marriage with Guy Ritchie). But in 2006, Madonna was featured in W magazine in a photo spread by Klein called "Madonna Rides Again." more ›