Cityfile: New York's Most Notable and Influential

• Is Kate Middleton, Prince William's girlfriend, planning to move to New York? Possibly! [DM]
• A coroner has ruled Michael Jackson's death was due to lethal levels of the anesthetic Propofol in his body, which may very well pave the way for prosecutors to file manslaughter charges against Jackson's doctor, Conrad Murray. [MSNBC, People, NYDN]
• In other Jackson family news, Barbara Walters has landed the first interview with LaToya Jackson, which will air on September 11. Exciting, huh? [ABC]
• Jessica Biel is the most dangerous celebrity on earth—at least when it comes to computer viruses. People who seek out info on Biel online stand a one-in-five chance of visiting a site "designed to damage their computer." [Us] More

• The Calvin Klein billboard in Soho that has caused a bit of controversy recently has been replaced. Of course, just swapping out the ads could be part of the company's PR strategy to keep people talking about the ad campaign, in which case, well, it worked nicely. [GoaG]
• Rumor has it Anna Wintour has offered a Vogue internship to Prince William's girlfriend, Kate Middleton. [Grazia]
• Rumor also has it Emma Watson is designing a teen line. [Fashionista]
• Olivia Palermo plans to model now: She's signed with Wilhelmina. [P6]
• Isaac Mizrahi is opening a store on the Upper East Side in August. [WWD]More

• Here's a rather unlikely rumor but an amusing one all the same: Prince William is supposedly thinking of moving to America with his girlfriend, Kate Middleton, and the two have been spotted house-hunting in Malibu. Frankly, if they were going to move to America—and they're probably not—we see them as more of a New York couple. And NYC could use a prince roaming around, couldn't it? Let's all cross our fingers and hope for the best. [E!] 
• Countess (and not-so-real housewife) LuAnn de Lesseps was spotted hanging out with young men and doing tequila shots at a club in the Hamptons last weekend. And the earth continues to rotate on its own axis, too. [P6]
• That was quick. Just a couple of weeks after Lindsay Lohan and Sam Ronson supposedly reunited, the couple appears to have split up again—and it's all Nicole Richie's fault, too. Or maybe they never got back together at all? Feel free to take your pick. [E!, People, AH]More

• Giuseppe Cipriani hasn't been seen in New York for months, but he says that has nothing to do with the handful of investigations now underway, or because he's banned from the US. He's just "busy" and says he'll return to New York "soon." His son Ignazio has been busy, too. The 20-year-old has been charged with third-degree assault for beating up a limo driver outside 1OAK back in December. [NYP, R&M]
• The latest man to fall into Paris Hilton's clutches: She was  was spotted at Sundance making out with MySpace CEO Chris DeWolfe. [P6, NYDN]
• Prince William's girlfriend, Kate Middleton, may be planning to move to New York to take a job in fashion, thanks to advice she received from Tom Ford and Anna Wintour. [Daily Express]
• Maureen Dowd threw a big party on Sunday eve to honor of David Geffen. In attendance: Tom Hanks, Jeff Zucker, David Katzenberg, Ron Howard, and George Stephanopoulos, who knocked over a tray of martinis and left the party red-faced. [P6] More

Happy Birthday | Model Maggie Rizer is turning 31 today. Dave Matthews is turning 42. Times book critic Michiko Kakutani is 54. Hot 97 host Angie Martinez is 37. Internet tycoon Lockhart Steele is 35. Indie film honcho Michael Barker is turning 55. Earl Graves, the founder of Black Enterprise, is turning 74. Author Judith Krantz is 81. Singer Joan Baez is 68. And Kate Middleton, who stands to become a princess if Prince William ever pops the question, turns 27 today. Weekend birthdays—including that of Jared Kushner—after the jump!More

• Start your engines, ladies: Sean Avery and Kelly Klein have split up. [P6]
• Mariah Carey may have collected as much as $1 million to perform three or four songs on St. Barts on New Year's Eve. [R&M]
• Lots of unresolved questions remain concerning the death of John Travolta's 16-year-old son, Jett, last week. [TMZ, NYP, Mirror]
• Get ready to see more of Lourdes Leon: Madonna's 14-year-old daughter has reportedly enrolled in Manhattan's Professional Children's School with hopes of starting an acting career. [Daily Mail]
• The new year isn't shaping up to be much fun for Gwyneth Paltrow. Her new diet bans dairy, gluten, meat, shellfish, nuts, potatoes, condiments, sugar, alcohol, and caffeine. [Telegraph]More