Lauren Conrad splits with 'DWTS' pro Former "The Hills" star Lauren Conrad, 25, is apparently back on the market. According to reports, Conrad, her new project is lauren conrad beauty book ended her romance with a "Dancing With the Stars" pro derek hough after three months of dating. Some say Conrad was on a rebound after splitting from her boyfriend of three years. DWTS dance pro Derek Hough and The Hills star Lauren Conrad always played coy about their relationship, but now it's no longer an issue. They had been spotted out multiple times over the past few months, much like Derek had been with rumored former girlfriend Cheryl Cole for some time. However, now Life & Style is breaking the news that Lauren and Derek have split. According to Life & Style, Derek Hough is single once again. The magazine shares that the pair had been quietly dating for the past three months, but now Conrad has broken up with the DWTS dance pro. A friend of Laur...