It's all over for Nicky Hilton and David Katzenberg. Due to conflicting, hectic schedules, the couple has split after four years of dating, insiders confirm to
The New York Post. "The main reason was that they have been busy with their work, and it has made it difficult to spend time together," a source
tells the newspaper. "Nicky has been back and forth traveling overseas a lot with her business. She has recently been in Asia promoting ...