The 36-year-old recently welcomed her fifth child – daughter Bunny Hayler – but was back to a size eight just three weeks after her birth in August.
KATIE PRICE: "I'LL SELL OFF MY OLD BREAST IMPLANTS FOR CHARITY"
Speaking on her new segment The Price Is Right, for Australia's Channel 7 The Morning Show, Katie confessed that every pregnancy she's had has been different in terms of losing the weight afterwards.
"I put on four stone with Jett. With Bunny I put on about a stone and a half, so my figure got back to shape really quickly," she said.
"After two weeks my belly was flat which was really weird because not with all of them has it been like that. But I have had a bit of a stressful year, so that probably made a difference.
KATIE PRICE: "I'LL HAVE MORE KIDS IN MY 40S – KIERAN BLINKS AND I'M PREGNANT"
"I don't think anyone should be in any rush at all after they've had a baby – enjoy the baby, don't worry about getting into shape is what I say."
Katie also discussed her decision to forgive Kieran for his affairs with two of her best friends, saying: "At the end of the day you've got to live each day as if it's your last. I could be gone tomorrow so instead of dwelling on the badness, always turn it into a positive and just focus."
She recently released her latest novel Make My Wish Come True, and Katie revealed the latest instalment of her autobiography will be out next year.
"There's lots of scandal as usual, and there's lots of stuff I couldn't put in my last autobiography," she teased.
On where she see's herself in the future, Katie joked: "I know in 20 years I shall look a lot younger than I do now!"