Former Apprentice candidate Katie took a jab at Gemma in her weekly The Sun column, telling readers: "I'm concerned for her."
Katie wrote: "Given her size, I can guess what one of her favouirte hobbies must be. Faced with a daily diet of rice and beans, Gemma will actually be looking forward to eating a kangaroo's bits, just for the protein."
It's not the first time Katie has taken a swipe at Gemma.
Outspoken Katie branded fashion designer Gemma as "fat" in a magazine interview earlier this year, prompting Gemma to hit back via Twitter.
Gem responded: "you are One UTTER MUG ! to think I was so nice to you when I met you you would love 1% of the love and admiration out there 4 me.
"Don't use my name to gain publicity look at your own life errr sorry who are you !!! Hahahahah @KTHopkins everyone UNFOLLOW HER x love Gem."
Gemma will enter the I'm A Celebrity jungle on Sunday night when Ant & Dec return to host the 14th run of the ITV show.
I'm A Celebrity begins Sunday 16 November at 9pm on ITV
Check out all of this year's jungle campmates here!
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