Lisa Maffia is taking part in "The All New Monty Ladies" Night" because of her mum's cancer battle.
The 39-year-old singer signed up to the show - on which female celebrities will strip off on stage to raise awareness of breast and cervical cancer - to support her mother, who beat cervical cancer in 2011, but she was recently diagnosed once again and is currently fighting the disease.
Speaking on "Loose Women", Lisa said: "I took part because of my mum, my mum was diagnosed in 2011.
"She had cervical cancer the first time and they said "six months to live" and she beat it, and then eight years later, unfortunately, it's come back and it's come back all over and she's fighting it again now.
"She is fighting it, she's fighting cancer. This show, I didn't realise what I was letting myself in for. I hadn't watched the show before."
The former So Solid Crew member was late to join the programme because she was busy caring for her mother, and she has found it "mind-blowing" to hear stories of her fellow contestants.
She said: "When I first started this show I was a little bit late, because I was at the hospital with my mum.
"I missed out on everyone's story so it took me a week to kind of learn what everyone was there for, and the stories are just heart-wrenching. Everyone's got their own reason for being part of the "Full Monty" and it's just amazing. It's mind-blowing.
"When I first got involved I thought anything to do with cancer, anything to raise awareness, and then when I got there I thought, "Have we really gotta do that? Have we really gotta bare all?" "
"The All New Monty Ladies" Night" airs tonight (07.05.19) at 9pm on ITV.