Sarah Harding was told by doctors that Christmas 2020 “would probably be my last” as she continued to receive treatment for cancer.The Girls Aloud star was diagnosed with breast cancer last year and shared the news with fans in August, at which point the disease had spread to other parts of her body.Harding has been working on a book, titled Hear Me Out, and she shared her prognosis in an extract published by The Times.In a foreword interview, the 39-year-old singer said she had had a mastectomy