Neil Sedaka's cause of death has been revealed after his death aged 86. The singing legend, famous for hits including Breaking Up Is Hard to Do, was taken to hospital in Los Angeles in February. His family later confirmed he had died. The singer-songwriter died from atherosclerotic cardiovascular disease with kidney failure as a contributing factor, according to a death certificate obtained by Fox News in the US. Atherosclerosis is when fat and cholesterol build up inside arteries. The singer's