WHAT DOES SHE WANT WITH ALL THAT BOOK-LEARNING?: Apparently mindfull of the need to find a career once the pop hits dry up, Britney Spears has signed up for college so that she'll have the proper paperwork to help her find something else - after all, Kevin Federline will need to be kept in the luxury to which he's rapidly becoming accustomed, and he's hardly likely to be able to keep up a household on the money he makes dancing, is he? We wonder if Britney has considered being a dental nurse. We think she'd be excellent at it - "here's some gloop, bite down on it now." We wonder if her new college - Pepperdine College - offers a course.