Billy Ray Cyrus’ ex-wife Firerose has undergone a double mastectomy after claiming her surgery was delayed due to their divorce. The 35-year-old singer has the BRCA1 gene, which means she is at higher risk of developing cancer, and she has now had the preventative cancer surgery. She captioned a picture from her hospital bed on Instagram: “With God on our side we’re stronger than we can even imagine. “Thank you so very much for all the prayers. I deeply appreciate the outpouring of love and support.” Firerose filed legal papers saying Billy Ray filed for divorce in May, one day before she was …