United Kingdom, Dec. 23 -- Michael Bolton feels "deeply grateful" to be surrounded by family amid his brain cancer battle.

The 72-year-old singer - who has daughters Isa, 50, Holly, 48, and 46-year-old Taryn with his ex-wife Maureen McGuire as well as six grandchildren - was diagnosed with glioblastoma in late 2023 and underwent immediate surgery and admitted having his girls nearby has meant "more than [he] could ever put into words.

He told AARP.org via email: "My daughters have been constant in a way that grounds me. On the harder days, they help me stay centered; on the lighter ones, they bring out the laughter that makes everything feel possible again.

"They remind me of who I am and what's worth fighting for.

"I'm feeling deeply...