Years of hip thrusting dance moves have taken a toll on Prince's joints and at age 49, he has been told he needs a hip replacement. "He used to wear high-heeled boots every day and doctors told him that may have contributed to his condition," said a source. "Over the years he has battered his body so much that his joints, especially his hips, are causing him a lot of discomfort." The singer has been told that only a full hip replacement will alleviate the pain and ensure he can keep dancing.