Charlotte was recounting the time that Katie made an appearance on the short-lived 'The Charlotte Church Show' when she made the claims, and the glamour model is NOT happy about it.
Writing in her column for Now magazine, Katie wrote: "So Charlotte Church has been talking about me again. She must have a record or something coming out and needed to mention me to get some headlines."
And Katie might have a point - Charlotte released her latest EP 'FOUR' earlier this month on her own record label.
"These days, I only seem to see pics of her performing in pubs - wearing strange outfits with dishevelled hair - instead of the stadiums she used to fill."
This new feud comes just as Katie managed to put another one behind her - she recently posed for a photo with Atomic Kitten singer Kerry Katona, who she famously fell out with after the two left the 'I'm A Celeb' jungle back in 2004.
Something tells us Charlotte might not be able to stay quiet about this one...