United Kingdom, April 30 -- Michael Bolton says "succumbing to the challenge is not an option" amid his cancer battle.

The 72-year-old singer - who revealed in January 2024 that he had been diagnosed with brain cancer in late 2023 and underwent immediate surgery - has spoken candidly about his health struggles, and how he's dealing with the fallout of his diagnosis.

He told PEOPLE magazine: "You're reaching into your resources and your resolve in a way that you never would have thought.

"Succumbing to the challenge is not an option. You're really quickly drawn into a duel. I guess that's the way you find out what you're made of."

Michael - whose speech, mobility and short-term memory have all been affected by his treatment, according ...