Jessica Simpson Crank-Calling Kristin Cavallari

Star magazine reports that Jessica Simpson is fed up with ‘Laguna Beach’ star Kristin Cavallari, convinced she dated her ex-hubby Nick Lachey for publicity. The final straw was a side-by-side photo comparison she saw in a magazine. “She was furious,” a source revealed. “She thought it was insulting and embarrassing to be lumped together with Kristin! As far as Jessica is concerned, Kristin’s a nobody, [a] 19-year-old reality-TV star who has just been using Nick for free publicity.” And in no time, “Jessica got hold of Kristin’s cell-phone number and got a real kick out of making crank calls to it.”