The trio formed in 1998 when they were just 13 years old and within two years they had rocketed to stardom with their debut hit Overload.
But a year later the British band began to fracture as Donaghy quit, and by 2009 all three members had abandoned the group, to be replaced by Heidi Range, Amelle Berrabah and Jade Ewen.
The original three singers reunited last year (12) under the bandname Mutya Keisha Siobhan and they are adamant there will be no repeat of the in-fighting that previously dogged them because they are older and wiser.
Donaghy tells ES Magazine, "Looking back there was a lot of divide and conquer going on. The adult world around us wanted to manage the environment and make it a business, and maybe forgot we were young and our happiness was important.
"We were teenagers. We weren't even old enough to drink! They saw us as interchangeable - it was all about the band, not the individuals, and that's not good for your self-esteem."
Buena adds, "We were just too young to appreciate it. We didn't realise our music was credible. (The management would say) 'You're number one!' (and I was thinking) Ok, can I go home now?"