Sugababe Keisha has come as dangerously close as anyone in the group has ever done to confirming what most already know: former member Mutya had bad attitude.

"Mutya brought more of a street element," she told the Mirror. "When Mutya was in the band there was something edgy about it. People say we look more united now."

"Mutya had been in the band since she was 11 and it just wasn't something she wanted to do any more," she added. "When someone's not happy with their situation, like Mutya was, it can start to have a negative effect on everything else around them."

But everything is sunshine and roses with new member Amelle, Keisha insisted. "She adds a touch of sophistication. A classy element... with Amelle it's more slick."