Princess Beatrice opened up on Sarah Ferguson’s health following her mother’s cancer diagnosis. The Princess of York appeared in a rare interview from the top of the Empire State Building earlier this week. During the interview with This Morning, she spoke about her mother who is “doing really well” after her second cancer diagnosis within six months. The Duchess of York was diagnosed with breast cancer last year before undergoing a mastectomy and reconstructive surgery. In January, the duchess announced that she had also been diagnosed with malignant melanoma, a form of skin cancer. On Monday…