The former glamour model said she isn't a fan of the Keeping Up With The Kardashians star's booty, explaining that she didn't understand why anyone would want "a shelf" for a bum.
The panel donned some fake bottoms for the show, where Katie declared: "I'm happy with my bum - I think I've got a good one."
Katie made the comments as the Loose Women panel talked bottoms while discussing Madonna'a sheer, lace Givenchy gown at the Met Gala in New York.
When talk turned to Kim, Katie said she wouldn't want a derrière like hers.
"No, I would not," said Katie. "Who wants a shelf? If you cut her head off - because she's got a beautiful face - I would not want her body, at all.
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Met Gala 2016 looks:
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