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• Things aren't looking up for Damon Dash. He's lost a fortune recently and is buried under a mountain of debt. Now it looks like he's losing his wife, too: Rachel Roy just slapped the hip hop mogul with divorce papers. [NYDN]
• David Letterman and his longtime girlfriend Regina Lasko got married last week. [NYP, Us]
• Courtenay Semel, daughter of media mogul Terry Semel and occasional girlfriend of Casey Johnson, has checked into rehab. [P6]
• The real reason behind Jen Aniston and John Mayer's split? Jen was supposedly sick of his "obsession" with Twitter. Naturally. [Sun, Telegraph]

• Angelina Jolie has started a liquid detox diet that's reportedly "leaving her weak" and "causing concern" on the set of her new movie, Salt. [Sun]
• More diet-related celebrity news: Britney Spears has been "slacking on her strict diet" and "binging on junk food." [SS]
• Rihanna was supposedly spotted getting cozy with Wilmer Valderrama at a club in LA last week. [Mirror]
• Paul Johnson-Calderon didn't just take a purse from the Eldridge last week: He's also accused of stealing a BlackBerry and a Chopard watch, too. [P6]
• Lance Armstrong broke his right collarbone after falling in a race yesterday and may have to undergo surgery. [CNN]
• Hugh Grant was spotted hooking up with two women at the Beatrice Inn on Friday. Just so you know. [P6]
• Robin Williams' doctors say his heart surgery was a success, and that he's now recovering at the Cleveland Clinic in Ohio. [E!]
• Katy Perry and Josh Groban are dating. [NYDN]
• Poor Kim Kardashian couldn't pronounce "philanthropic" at a benefit she hosted for Russell Simmons. Feel free to feign surprise. [NYDN]
• Fergie has reportedly been invited to the White House to put on a private concert for the Malia and Sasha Obama. [NYDN]
• Derek Jeter wants to build a massive mansion in Tampa, although "insiders" think it may hinder his chances of finding a wife since "no woman in her right mind is going to move into a 31,000-square-foot house unless she has had input on how it's decorated." Duly noted. [P6]