Oh, Poor Fashion WeekFewer Hollywood stars than usual are expected at Fashion Week when it starts September 5, because the Emmys and the MTV Video Music Awards are the same week. Dan Rather was confused by the “Thriller” dance stunt performed by Katie Couric’s staff last week, though he thinks her job is safe. Arianna Huffington may be dating Newark mayor Cory Booker. Cuba Gooding Jr., who is married with three kids, recently made out with five girls in one night at Tenjune. Jeremy Piven got into a heated argument with his mother at Nobu Malibu, though it’s unclear about what. Gwyneth Paltrow has been trekking around Spain with Mario Batali for a PBS cooking show (and hubby Chris Martin almost didn’t get into the premiere of her brother’s new movie). Cameron Diaz had a romantic dinner with John Mayer at Mai House in Tribeca. Residents of Martha’s Vineyard are happy that Larry David and Laurie are broken up and that Larry is dating again.