Derek Hough’s wife Hayley Erbert has undergone emergency brain surgery. The ‘Dancing with the Stars’ pro dancer turned judge on the show, 38, told his Instagram followers on Thursday (07.12.23) his 29-year-old partner, who he married in August, had become “disoriented and was taken to the hospital” at the end of their show in Washington, D.C., on Wednesday night. He told fans: “She was diagnosed with a cranial hematoma from a burst blood vessel and required an emergency craniectomy.” A craniectomy is a neurosurgical procedure that involves removing a portion of the skull in order to relieve pr…