IF you’ve had a bellyful of Brexit here’s a new In/Out debate.
With celebs flaunting their taut tums in bikinis and crop tops, you may have noticed that belly buttons fall into distinct types.
Some stick out, others sink in, and Emily Ratajkowski’s inbetween affair proves that even supermodels aren't perfect.
Their shape can even give away whether the owner once had a piercing or even a nip/tuck.
Here, if you can stomach it, JENNY FRANCIS goes navel-gazing and reveals the button bunches...
Innies
THE most discreet type of all, an innie doesn’t show any wrinkly skin – just a darker hole in the middle of the tummy.
Reality TV star Kim Kardashian, 35, and model Kelly Brook, 36, are both in the innies crowd.
So too are pop star Katy Perry, 31, and singer and actress Selena Gomez, 24.
Outies
STICKIE-outie belly buttons come in all shapes and sizes.
This protruding type shows everyone a little more than they’d like to see.
Model Gigi Hadid, 21, popped hers out on the way to a photoshoot in New York recently. And in her wilder Ginger Spice days Geri Horner, 44, often got her outie out.
Other famous outies include actress Katie Holmes, 37, and American Black Eyed Peas singer Fergie, 41.
Inbetweenies
THE inbetweenie is the floating voter of the belly button world – it just can’t decide if it is in or out.
Emily Ratajkowski, 25, showed hers while modelling swimwear in yesterday’s Sun.
Also in Emily’s gang are model Abbey Clancy, 30, telly’s Myleene Klass, 38, and actress Gwyneth Paltrow, 43.
Rebellies
HAVING your belly-button pierced is the ultimate “I’m not a kid any more” statement.
But when you grow out of being a wild child and ditch the metal belly bar it leaves a little round reminder of your rebellious teens.
The rebellie bump is evident in Helen Flanagan, left, singer Miley Cyrus, 23, actress Jessica Alba, 35, Little Mix’s Leigh-Anne Pinnock, 24, and reality star Amy Childs, 26.
Mini
AS the name suggests, minis are tiny, barely visible navels that are cute as a, well, button.
Major stars who have been flaunting their minis in bikinis recently include ex-Made In Chelsea’s Millie Mackintosh, 27, and pop star Taylor Swift, 26.
Other mini celebs include actress Keira Knightley, 31, and Girls Aloud singer Kimberley Walsh, 34.
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Nip/tuckies
IF you don’t want to admit to going under the knife, keep your belly button under wraps.
A stretched, misshapen-looking belly button can give the game away, and may indicate the owner has resorted to a little nip/tuck.
Anything you want to tell us Demi Moore, 53, rocker Courtney Love, 52, and designer Donatella Versace, 61?
Nonies
THE rarest of all belly button types is the nonie, where the navel is practically non-existent.
In fact, the only celeb member of this select group is Czech Karolina Kurkova, above. The 32-year-old underwear model, once a Victoria’s Secret Angel, has even had a fake belly-button airbrushed into her photos in the past to make her appear “more normal”.
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