India, Aug. 10 -- O n Sunday, singer Sonu Nigam shared a video of himself crooning late singer Mohammed Rafi's Suhani Raat Dhal Chuki (Dulari, 1949) while lying on an operating table undergoing surgery. The unusual moment left fans concerned and wondering what had happened. Nigam now tells us that the surgery was related to a recurring growth on his left ring finger. "It's been happening for some time. I had a surgery four months back to remove it, but it has come back again. I think it's got to do with my arthritis," he shares. Explaining how he ended up singing during the procedure, the 53-year-old says, "Dr Nilesh Sathbhai is an admirer of mine and he was playing my songs during the surgery. There were some songs playing without vocals, so I just started singing. It happened organically. They enjoyed it and said it has never happened that a patient is singing for the doctors while they operate." Nigam says he was the one who suggested that the doctors record the moment: "I told them they could record it as a memory if they wanted." Despite the health setback, the singer says he has no plans to slow down. "After the surgery, on Thursday, I went for the launch of my song Chunni. So I have been on the move even after the surgery, and I am not on a break."...