If there are any non-celeb ladies out there who have recently had babies then you might want to look away now.
This woman - Gisele Bundchen to be precise - had that child she's carrying around in what looks distinctly like a rucksack FOUR MONTHS AGO.
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The Brazilian supermodel showed off her post-baby body (which looks very much like her pre-baby body to these eyes) during a beach break to Costa Rica.
Joining Gisele and her four-month-old daughter Vivian Lake on the trip was her American footballer hubby Tom Brady, their three-year-old son Benjamin and their pitbull, Lua.
Gisele's amazing bod might have something to do with her pre-birth fitness routine of Kung Fu and Yoga.
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The 32-year-old told Vogue: "I did kung fu up until two weeks before Benjamin was born, and yoga three days a week. I think a lot of people get pregnant and decide they can turn into garbage disposals."
And if you think that sounds a little, well, smug then you'll no doubt be even more irritated by what she had to say about giving birth for the first time.
"It wasn't painful, not even a little bit," she told Brazilian TV show Fantastico. "The whole time, my head was so focused – every contraction, the baby is closer, the baby is closer.
"So, it wasn't like, 'Oh, what pain.' It was, 'With every contraction, he is getting closer to me.' "
Who's the mumma? Kim KardashianWho's the daddy? Kanye WestBaby ETA: Next yearInteresting fact: Kim's difficulty conceiving the couple's second child was chronicled in 'Keeping Up With The Kardashians', before confirming she was pregnant with a son. (credit:Jason Merritt via Getty Images)
Pregnant Celebs(02 of08)
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Who's the mumma? Coleen RooneyWho's the daddy? Wayne Rooney. Maybe you've heard of him.Baby ETA: JanuaryInteresting fact: This will be the third child for the happy couple. (credit:Shirlaine Forrest via Getty Images)
Pregnant Celebs(03 of08)
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Who's the mumma? Sam FaiersWho's the daddy?Baby ETA: Early 2016Interesting fact: Sam confirmed her baby news on Instagram. (credit:Tim P. Whitby via Getty Images)
Pregnant Celebs(04 of08)
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Who's the mumma? Keira KnightleyWho's the daddy? James RightonBaby ETA: Spring 2015Interesting fact: Keira and James tied the knot in May 2013. This will be their first baby. (credit:Steve Granitz via Getty Images)
Pregnant Celebs(05 of08)
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Who's the mumma? Katherine JenkinsWho's the daddy? Andrew LevitasBaby ETA: Late 2015Interesting fact: The couple shared their baby joy with an adorable snap on Instagram of a pair of pink shoes. (credit:Steve Thorne via Getty Images)
Pregnant Celebs(06 of08)
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Who's the mumma? Olivia ColmanWho's the daddy? Ed SinclairBaby ETA: Summer 2015Interesting fact: The 'Broadchurch' actress has two children already with her writer husband, Ed. (credit:David M. Benett via Getty Images)
Pregnant Celebs(07 of08)
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Who's the mumma? Katie HalilWho's the daddy? Howard DonaldBaby ETA: Early 2016Interesting fact: This will be the first couple for the couple, who married secretly earlier this year. (credit:Bauer-Griffin via Getty Images)
Pregnant Celebs(08 of08)
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Who's the mumma? Kelly ClarksonWho's the daddy? Brendan BlackstockBaby ETA: Early 2016Interesting fact: Kelly confirmed her baby news in a typically Kelly Clarkson-esque fashion, by claiming she was "totally pregnant" during a live show. (credit:Bruce Glikas via Getty Images)