The current war of words kicked off when Cole spoke about Walsh's role as the girl group's manager, telling a magazine that he had had "zero involvement" in their career. Angered by the comments, Walsh responded that his "friendship" with the 'Promise This' star was "over".
© PA Images
Speaking to Heat magazine, the Irish music manager continued to criticise Cole, who he worked with on three series of The X Factor.
"What is she peddling this time? Eyelashes or hairspray? It's definitely not her music!" he said. "At least I am still on The X Factor and happy to be there. I'm a much better manager than she is a singer. She seems to be in the fashion business now, selling fake hair pieces, fake eyelashes, fake everything."
He continued: "Has anyone ever heard her sing live or a cappella? If she comes back on The X Factor, she needs to sing live this time. I don't know why she's started this war with me.
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"I've always liked her - she's a very good looking girl, but obviously not the best singer in Girls Aloud. Nadine is - I always said that. Cheryl is a great clothes horse. Nice girl, but likes to get her own way."
In a final dig, Walsh added: "I've got two words to say: vocal lessons. When I write my book, I'll tell the real story of Cheryl."
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Watch the video for Cheryl Cole's 'Parachute' below:
