Michael Bolton has undergone surgery on a brain tumour. The 70-year-old singer has taken to Facebook to reveal that he was recently diagnosed with a brain tumour and will be taking a break from performing while he recovers from surgery. Michael wrote: “I want to start by wishing everyone a very happy and healthy new year! “I also want to share that 2023 ended up presenting me with some very unexpected challenges. Just before the holidays, it was discovered that I had a brain tumour, which required immediate surgery. Thanks to my incredible medical team, the surgery was a success. I am now recu…