Linda Nolan has said learning that both she and her sister Anne needed cancer treatment during lockdown was a "double nightmare" as it meant they would be isolated from each other.
The pair, part of Irish family pop group The Nolans, revealed this week that they were both being treated for the disease at Blackpool Victoria Hospital.
Linda, 61, has liver cancer, her third recurrence of the disease, while Anne, 69, has stage three breast cancer.
Linda told Good Morning Britain:
Linda, who appeared on the programme via video call, was not joined by her sister as she was feeling too weak.
She said she had been "traumatised" by losing her hair to chemotherapy.
"I managed to keep my hair a little bit last time," she said.
"I was traumatised by it. I feel vain saying that the worst thing at the moment is I have no hair, but it has been traumatising for me. It's been a massive shock."
Linda and Anne's sister Bernie died of breast cancer in 2013 at the age of 52.