LONDON (AP) – You may have been hearing whispers about Stevie Wonder having some kind of serious health problem. The singer-songwriter is now confirming that. He told a concert audience in London over the weekend that he is in need of a kidney transplant. Speaking to his audience on Saturday night, Wonder said he was doing the shows in London then would be “taking a break.” He says he plans to have the kidney transplant “at the end of September.” Wonder says he has already found a donor – and predicts that he will be fine. The 69-year-old singer says he wanted to tell his fans himself – to tamp down speculation about his health.