Natasha Hamilton has admitted there were some "major catfights" behind the scenes in Atomic Kitten.
The singer, 40, started out in the group in the late 90s along with Kerry Katona and Liz McClarnon.
Reflecting on those days on This Morning, she said the girls did fight but that they were always able to make up.
"We had each other's backs through thick and thin," she said.
"We didn't always agree and there would be some major catfights behind the scenes!
"But we put it to bed, it's like siblings you know, you fall out every now and then but you love each other and support each other."
Hamilton - who is currently expecting her fifth child - is now joining The Real Housewives Of Cheshire.
And she admitted that when she was asked to join the reality TV show she wondered what it would be like as she had "worked with feisty ladies before" in the band.
"I know what it can be like, it can be intense!" she added.
Hamilton is also getting back to music with her solo career.
She told the ITV show's hosts Alison Hammond and Dermot O'Leary her music was "really modern" and that she wanted something "a bit harder, a bit cooler".
The star said she was in a great place in her life right now.
"The past five years of my life, I feel like I've had a rebirth," she said.
"Really got my act together, I do a lot of work on myself and healed from my past and whatever has happened. And now it's all about embracing who I am as a 40-year-old woman."
Watch: Atomic Kitten's Natasha Hamilton reveals she is expecting again