Cheryl Fernandez-Versini thinks Louis Walsh has an "obsession" with her after he branded her "Irrelevant" and "lazy" on 'The X Factor'.
The bitter attack comes as the former judge was axed from the ITV talent show for the next series, although he reportedly left on good terms with boss Simon Cowell.
Louis thinks the 'Crazy Stupid Love' singer is lucky she has her job and needs to up her game after her lackluster performance on the last run.
The 62-year-old music manager told heat magazine: "Cheryl wasn't great last year, she's sometimes lazy and lacks energy. She needs to give more, she can give so much more. She's irrelevant these days. I know people say the same about me, but apart from anything, I am fun and I have a rapport with Simon."
Cheryl - who is believed to be returning to the judging panel for the next series - has wasted no time to hit back at Louis on Twitter, insisting he should only open his mouth when he has something positive to say.
Her tweet read: "Dear Lou Lou. Try using your mouth to say something positive abt something positive.(sic)"
She followed up her tweet with another outburst revealing he used to ask her what he should say to contestants before the live shows.
Cheryl tweeted: ".. and btw.. This is the same man asking me what he should say to contestants on our way to the stage bc "he doesn't know"(sic)"
Tagged in Cheryl Tweedy Louis Walsh Simon Cowell