The pregnant model, 36, divulged the information during a conversation on her Fubar Radio on Tuesday (24 June), freely admitting that she prefers going commando both at home and while out.
Katie said: "I never wear knickers unless I obviously have a short skirt on, which doesn't happen often these days. I don't like to wear knickers!"
Despite hating undies on a regular basis, the star did say she has a drawerful of sexy ones for the bedroom. "If I'm wearing it in the bed with a man, I have all of the gear. I do love underwear. I have so much of it, but why do I want to wear a cheesegrater when I can wear none?"
Katie actually seemed surprised that her co-host and guest DID wear underwear every day.
Well, you learn something new every day, don't you Katie?!
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