Nicky Hilton and David Katzenberg Split After Four Years

Sources have confirmed that Nicky Hilton has quietly split with longtime boyfriendDavid Katzenberg after four years of being together.  Evidently Hilton's parents were hoping she would eventually tie the knot with the son of DreamWork's Jeffrey Katzenberg, but just like most kids take pleasure in disappointing their parents, the Hilton girls are no different.  Sources claim that the split was amicable and happened after their work pushed them in different directions.  One friend divulged that "They broke up quietly after four years together. The main reason was that they have been busy with their work schedules, and it has made it difficult to spend time together." The friend adds, "Nicky has been back and forth traveling overseas a lot with her business. She has recently been in Asia promoting her jewelry line, and David is starting a new production company. Their schedules never seemed to match." Despite the split, the ex-couple have been talking and tweeting one another (how romantic?).  So there's no drama...really?  How very un-Hilton of them.  A source backs up this hard to believe claim stating, "There is no scandal or any third person -- they remain close friends, they have been friends since they were teenagers." Sorry to hear about the split Nicky, but look on the bright side -- you'll always have Paris.