Girls Aloud were one of the most successful girl bands in the UK but Louis Walsh, who originally managed the band, said the singers didn't even like each other.
The band consisted of Cheryl, Nicola Roberts, Kimberley Walsh, Nadine Coyle and Sarah Harding.
The 63-year-old, who recently announced his return to the "X Factor", also made a dig at the girls, claiming Nadine was the only one that could sing, reported Digital Spy.
"I didn't give them a lot of my time but they didn't give me time and they didn't even like each other!" he said.
"It was problems from day one there. I contacted them as much as I could but they didn't like each other. It was never going to work because I said Nadine was the best singer and she was. She was the voice of Girls Aloud.
