NEW YORK — Singer Carly Simon has been diagnosed with Parkinson’s disease and was recently treated for skin cancer, the singer shared in a statement provided to The Associated Press. The truth is, I’ve been learning how to live with Parkinson’s disease,” Simon’s statement read. After an extensive evaluation at the Mayo Clinic, I was diagnosed with Parkinson’s,” she said. About 1 million Americans are living with Parkinson’s, and 10 million people worldwide, the Parkinson’s Foundation estimates. She also shared that she was treated for basal cell carcinoma, a common form of skin cancer, on her face at the same time.