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• Madonna fell off a horse while riding at photographer Steven Klein's house in Bridgehampton on Saturday. She wasn't seriously injured, but don't think for a minute she's taking any blame for the spill. Her flack blamed the accident on a rogue paparazzo who jumped out of the bushes and startled the horse, although both the photographer in question and the police don't share that account. [NYDN, NYP, E!]
• Uma Thurman and Arpad Busson were rumored to be getting hitched in the Bahamas on Saturday, although there's still no word on whether any ceremony actually took place. [People, UPI]
• Has Lindsay Lohan gone straight? She was spotted "flirting relentlessly" with a group of guys including Leonardo DiCaprio at a club last week. [Sun]
• Rumor has it Naomi Campbell is thinking of moving to Moscow so she can be closer to boyfriend Vladislav Doronin. Say it isn't so! [DS]

• Britney Spears has apparently "convinced herself" that her dad is "drugging her" in an effort to "to keep her subdued." [SS]
• Agyness Deyn is reportedly dating musician Alex Greenwald. [DS]
• Slumdog Millionaire child actress Rubina Ali's father reportedly offered to sell her for $300,000 to an undercover reporter. [MSNBC]
• More news on Mel Gibson's split: He's reportedly been living in a suite at the Four Seasons since 2006, although his Russian mistress has been living at a separate home he's owned since 2008. [R&M, NYDN]
• Jennifer Aniston supposedly wants to date Gerard Butler. [DM]
• Kelly Killoren Bensimon says she would "love to do" Dancing With the Stars. Go for it, sweetheart. [WWD]
• A three-judge panel in Malawi will convene on May 4 to hear Madonna's adoption appeal. [People]
• Annette de la Renta is expected to testify at the trial of Anthony Marshall, the son of Brooke Astor. But it seems she may have been just as eager to get her hands of some of the late socialite's riches. [NYDN]
• Amy Winehouse appears to have burn marks on her legs, although it's unclear why. Whatever it is, it's not good. [Sun]
• Andy Roddick and model Brooklyn Decker were married on Friday. [Us]
• Dabney Mercer has a new boyfriend, in case you care. [P6]
• Nicole Ross, the socialite daughter of Courtney Sale Ross and the late Steve Ross, has split with her longtime doctor boyfriend, Jared Green. [P6]
• Grey's Anatomy star Ellen Pompeo is pregnant. [People]
• Breaking news! Victoria Beckham has joined Sports Club LA and plans to start taking pilates. [DM]
• David Blaine has gotten engaged to 23-year-old French model Alizee Guinochet. [Janet Charlton]
• Rachel McAdams and Josh Lucas were spotted "looking very cozy" and "making out" during a dinner at Little Giant last week. [P6]
• Peaches Geldof says she plans to release an album. [DM]
• Filmmaker Edmund Druilhet says he's already started work on a Bernie Madoff "docudrama." [P6]
• Mario Lopez is writing a children's book. How exciting! [PW]