Cityfile: New York's Most Notable and Influential

• DJ AM's overdose on Friday appears to have been accidental, according to law enforcement sources who spoke with TMZ. It seems the celeb DJ, who claimed he'd been sober for 11 years, only started using drugs again after he was prescribed anti-anxiety and pain meds following his plane crash last year. [TMZ, NYDN]
• Those rumors that Chelsea Clinton plans to marry boyfriend Marc Mezvinsky in Martha's Vineyard this summer are heating up again. A large tent and stage have been set up in the area, although no one's sure if it's for the Clinton wedding. [P6]
• Joan Rivers says Libyan leader Moammar Khadafy was thinking about renting her Fifth Avenue apartment for $200K a week, but recently changed his mind. The upshot? Rivers won't have to worry about the dictator "roasting cows in her living room." [P6] More

Chelsea Clinton Mezvinsky? | Is Chelsea Clinton getting married this summer? Rumors that former first daughter plans to tie the knot with longtime boyfriend Marc Mezvinsky in the near future first surfaced in late March, and although the Clinton family has steadfastly denied the reports since then, "well-connected residents" of Martha's Vineyard" now say the wedding is planned for late August at the home of Vernon Jordan, the Democratic power broker and top exec at Lazard. (Previously, it had been reported that the wedding might take place at the Martha's Vineyard home of Ted Danson.) The Clintons still maintain it's not happening, although if you have plans to be on Martha's Vineyard at the end of August—which is when the Obamas are expected to be on the island—you'd be well advised to take precautions and make alternate vacation arrangements as soon as possible.  [NYM]

• It wouldn't be fashion's biggest night without a bit of drama thrown in to spice things up. Naomi Campbell, Linda Evangelista, and Christy Turlington are reportedly skipping the Costume Institute gala this evening, possibly because Kate Moss was chosen to co-chair the event; meanwhile, Karl Lagerfeld, Azzedine Alaia, and Domenico Dolce and Stefano Gabbana are all staying home, perhaps because Marc Jacobs has "commandeered the event" by buying two tables and dressing Moss, Madonna, and Kerry Washington. [P6]
• The Chelsea Clinton wedding rumors continue: The Boston Globe reports the former first daughter and Marc Mezvinsky may get hitched at Ted Danson and Mary Steenburgen's home on Martha's Vineyard in August, which is when the Obamas will be in town, too. [BG, NYDN]
• Kelly Killoren Bensimon says picking on her has become "the new recession vocation." Sounds about right. [R&M]More

Is Chelsea Planning a Wedding? | The always reliable National Enquirer is reporting that Chelsea Clinton plans to tie the knot with boyfriend Marc Mezvinsky "in a lavish $1 million dream wedding" this summer. Of course, she hasn't even announced she's engaged yet, so you may want to take this news with a grain of salt. But you'll be happy to hear that the timing is "perfect" now that Chelsea's mom is "settling into her position as secretary of state," and Marc's father, former Iowa congressman Ed Mezvinsky, "has been released from a halfway house after serving time for investment fraud." Sounds ideal, actually. [NE]

♦  Are Madonna and Guy Ritchie really divorcing? It might be another rumor or really a Sun exclusive, but the British tabloid says they plan to announce the split as soon as today. [The Sun]
♦  Christie Brinkley is suing Peter Cook for violating the couple's confidentiality agreement by talking about their relationship on 20/20. [NYP]
♦  The "mystery illness" that's caused Janet Jackson to cancel tour dates is supposedly a vestibular migraine, which "induces the sensation of vertigo." The good news is that now she's apparently cured. [ET]
♦  Raffaello Follieri's lawyers yesterday asked a judge to "go easy" on Raffaello in exchange for his quick return to Italy where he'll "never be heard from again." Ha! [NYDN]
♦  The 40-year-old CEO of a company called Future Tech Enterprise on Long Island is actually paying $20,000 to box Michael Lohan. And Stephen Baldwin is now planning to serve as the match judge. [Newsday via NYO]
More