THAT Annie Leibovitz likes Dr. Michel Cohen, her French pediatrician, so much she took time out of her busy schedule to shoot the cover of his book, "The New Basics: A-Z Baby & Child Care for the Modern Parent" (Regan Books) . . . THAT William Morris is shopping a Michael Jackson book by Diane Dimond, the Court TV reporter who broke several stories in Jackson's child-molesting case. The proposal just landed on publishers' desks . . . THAT Ivana Trump's foot, which she injured while skiing in Aspen, has healed. She is back in her stilettos and off to Palm Beach and a cruise on her yacht, My Ivana, to Nassau with her man, Rossano Rubicondi . . . THAT "Sexpert" Baroness Sheri de Borchgrave, who used to pen a sex column for Cosmopolitan, will kick off a biweekly series of striptease lessons on Jan. 13 at the Penthouse Executive Club . . . THAT Calvin Klein designer Francisco Costa has stitched up a special wardrobe for pop-tart Mandy Moore to wear while promoting her new movie "Chasing Liberty."