Kimberley Walsh has revealed the reason behind the infamous rift between Nadine Coyle and the other members of Girls Aloud.
Writing in her autobiography, which is being serialised in The Sun, Kimmy lifts the lid on one of the most intriguing feuds in showbizland - and claims that the girls felt "betrayed" by Nadine.
She insists that she and Nads were close friends in 2007, but began to drift apart as Nadine spent more time in LA.
And things came to a head in 2009, as she explains: "Cheryl and I were in the Winnebago, getting ready, when our manager Hillary Shaw took a phone call.
"When she hung up, she was all in a panic. 'What's wrong, Hills?' Cheryl said.
"'Oh nothing', Hills whispered. 'It's just Nadine's bloody manager'.
"'What? Nadine's what?'"
"It turned out that Nadine had taken on someone to represent her as a solo entity, and we knew absolutely nothing about it. We felt like we'd been sucker-punched.
"It was hard for us to accept her need to separate herself from the rest of us, because at that time none of us had considered a solo career, and she never once talked to us about it."
Walsh freely admits that the group don't all get along and reveals that she would only choose to be pals with Cheryl Cole and Nicola Roberts if they had not been a group.
She explains that she has never hit it off in the same way with Sarah Harding or Nadine.
"That's not to say I don't care about them or respect them," she hedges.
"They're just very different from me and I don't always understand where they're coming from.
"I suppose you choose the people you want to spend time with because they're the people you get on with and who bring out the best in you."
the star also opened up about Louis Walsh and his management skills or lack off
The star said: "He has since admitted to me he didn’t know what to do with five girls and that he was a bit scared of us, but I'm not sure that's the whole truth.
"Louis has just never really been a hands-on type of manager, and back then we suffered because of it.
"Whatever the case, his disappearing act meant we had nobody looking after us and nobody fighting our corner as far as record company decisions went."
And she expanded on the effect that she says the lack of supervision had on the group.
"In those days we had no one planning our day-to-day diaries and no one keeping us in line and organised — and very quickly it became a mess.
"There seemed to be lots of hanging about and not knowing what was going on, and the main reason was that Louis seemed to have disappeared off the face of the earth.
"Still, we motored on with recording our debut album. We followed that with roadshows and gigs at clubs and universities. The problem with the gigs was that we had no guidance from Louis whatsoever.
"Nobody organised hair or make-up, costumes, styling or anything like that, so consequently we looked absolutely horrendous most of the time.
"There we were, this fabulous new girl group with two top-three singles under our belt, turning up in T-shirts, jeans and trainers, or whatever we happened to be wearing.
"Sometimes we'd step out on stage looking like a complete hotchpotch of unco-ordinated horror."
And the Strictly Come Dancing runner-up hit back at claims from Louis that he had been put off by the girls' feuding.
"He said we never got on and were obsessed with who was the skinniest and going out with footballers. That would be almost funny if it wasn't such an embarrassing LIE.
"He knew nothing about us because he was never there."
The Sun quotes Louis as responding: "Kimberley who... ? Wait until my book comes out!"
Kimberley Walsh's A Whole Lot Of History is published by Hachette on 26 September.
