Michael Bolton said he was recuperating at home after a successful operation to remove a brain tumour over the Christmas period.
The US singer-songwriter said he was “working hard to accelerate” his recovery but the diagnosis and surgery meant he had to take a “temporary break from touring”.
In a statement posted on Instagram, he said: “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 recuperating at home and surrounded by the tremendous love and support of my family.”
The two-time Grammy-winning singer said he would be devoting his time and energy to recovery over the next few months.
Bolton, 70, was due to perform on 1 February at the Murray theatre at Ruth Eckerd Hall in Florida, with six tour dates in February, before three in both March and April.
It is not yet known whether Bolton will be able to headline the London O2 Arena with guest Bonnie Tyler on 25 July as scheduled.
The statement added: “It is always the hardest thing for me to ever disappoint my fans or postpone a show, but have no doubt I am working hard to accelerate my recovery and get back to performing soon.
“I am beyond grateful for all the love and support you have so generously shown me through the years. Know that I’m keeping your positive messages in my heart, and I’ll give you more updates as soon as I can.”
