Not one to hold back when it comes to her opinions, Katie took to Twitter to share her thoughts on CBB's new series.
And with one particularly housemate on her mind, Katie couldn't resist making a dig at Gemma while doing so...
She tweeted: "CBB nearly back with us. Did I hear Gemma Collins? Shut the store room door."
A little harsh, Katie?
Along with appearing to mock Gemma's weight, Katie also shared a video of a montage of her funniest moments from when she entered the CBB house a year ago.
Gemma is yet to respond to Katie's tweet, but many Twitter users have shown the former TOWIE star their support and hit out at Katie for her jibe.
One user wrote: "Still sore from pricey beating you? Let the green eyed monster go!!" While another replied: "A ridiculous, low witted comment...."
Others were quick to share their wish for Katie to re-appear on CBB.
A fan told the controversial star: "My fave housemate ever....you were hilarious...wish you were going back in!" While another admitted they are looking forward to Katie's commentary as this series of the Channel 5 reality show plays out.
Tonight, viewers will get too see a brand new batch of celebrities enter the house and live under Big Brother's rule.
If Gemma does make an appearance, she has been warned to expect a few "unwelcome surprises", thanks to the house's new gothic vaudeville theme.
Other celebrities rumoured for this series are former Hollyoaks actress Stephanie Davis, Geordie Shore star Scott Timlin, David Gest, Ex On The Beach's Megan McKenna and Danniella Westbrook.
Ex-EastEnder Danniella appeared to confirm her place on the show, after sharing a few telling tweets on Twitter yesterday. She told fans she was handing her account over to close pal Harry Derbidge for a while, before cryptically adding: "I got this."
Jonathan Cheban is also thought to be a dead cert for CBB, after Kim Kardashian tweeted and deleted about his place on the show.
She told fans: "OMGGGG I can't believe @JonathanCheban is doing Celeb Big Brother UK. I'm dying to see this! He's going to be hysterical!!!!"
Made In Chelsea star Stephanie Pratt also commented on Jonathan's CBB stint, wishing her friend good luck in his "new house".
Celebrity Big Brother returns tonight Tuesday 5 January at 9pm on Channel 5.
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