United Kingdom, Dec. 22 -- Barry Manilow is to undergo surgery after being diagnosed with lung cancer.

The veteran entertainer, 82, has revealed he recently battled bronchitis and a scan of his lungs picked up a "cancerous spot". He's now preparing to undergo an operation to remove part of his lung and he's been forced to call off all his upcoming concerts.

In a post on Instagram, Barry explained; "As many of you know I recently went through six weeks of bronchitis followed by a relapse of another five weeks.

"Even though I was over the bronchitis and back on stage at the Westgate Las Vegas, my wonderful doctor ordered an MRI just to make sure that everything was OK.

"The MRI discovered a cancerous spot on my left lung that needs to b...