The 56-year-old revealed during a podcast that she was “disappointed by the behaviour of a certain star behind the scenes.”
As fans tried to work out who she could be talking about, Coleen has quashed any speculation by addressing it directly on Instagram.
The star reassured fans that she was not talking about any of her “fabulous Loose Women girls.”
She wrote: “Hello you lovely lot . . . so there’s been some speculation about which celebs I was referring to when I spoke about meeting a few divas over the years.
“Can I just state “emphatically” that I WAS NOT talking about any of my fabulous Loose Women girls!!
“Now can I PLEASE go back to eating Easter eggs!!! Love you all! Have a lovely Easter!Xxxx”
This comes after the mother-of-three went on Melanie Blake’s podcast Girl Talk last week.
She told listeners: “I cannot say names because I’d be taken to court, the vast majority are fabulous.
“There’s the odd who yes, on screen, comes across as lovely and the girl-or-boy-next-door and all that, but actually behind the scenes aren’t very nice.”
Coleen added: “They are quite diva-ish and I find it very difficult to hide my disappointment.”
Fans of the show were quick to speculate who Coleen could be referring to.
However, since Coleen’s post on Thursday, fans have been left head-scratching as to who this celebrity diva could be.