Lance Armstrong and Sheryl Crow have split, the couple announced in a joint statement Friday night. The seven-time Tour de France champion and the rock star announced their engagement in September. It would have been her first marriage and his second. He has three children from a previous marriage. "After much thought and consideration we have made a very tough decision to split up. We both have a deep love and respect for each other and we ask that everyone respect our privacy during this very difficult time," the statement said.