Neil Sedaka's cause of death revealed Neil Sedaka's death certificate has been released, two weeks after he passed away. 19 March 2026 Neil Sedaka's cause of death has been revealed, two weeks after he passed away at the age of 86. Neil Sedaka died last month The legendary singer-songwriter - who was best known for hits including Breaking Up Is Hard to Do, Oh! Carol, Calendar Girl, and Happy Birthday Sweet Sixteen, as well as writing songs for the likes of Connie Francis, The Monkees and ABBA - passed away on 27 February and now his death certificate has been published by the New York Post new...