Keith and Nicole Scoop On Vogue Cover

6/11/2008 Lisa Ann Schleipfer   Nicole Kidman is staying fit during her pregnancy, as photos of her and husband Keith Urban have turned up this week, showing the happy couple leaving a gym in Nashville. Meanwhile E! Online reported more details yesterday on the July Vogue cover that will feature Kidman.  The cover photo was taken by legendary photographer, Annie Leibovitz, and Kidman wore a gown by designer Catherine Martin, who won the Oscar for costume design with her work on Moulin Rouge. The dress Kidman donned for the cover was impressive enough for Martin to design four different versions of it—to be sold in the exclusive Bergdorf Goodman department store.