Derek Hough has hailed his wife Hayley Erbert as an “absolute miracle” following her brain surgery. The 38-year-old dancer – who is best known for appearing as a professional on ABC’s ‘Dancing with the Stars’ – tied the knot with Hayley, 29, in 2023 but she required an emergency craniectomy last year to treat a cranial haematoma, and in December she had another operation to replace a portion of her skull which was removed during the first procedure. Speaking on ‘The Jennifer Hudson Show’, he said: “She is doing amazing. She is an absolute miracle, miraculous. It’s been a rollercoaster. It’s be…