The 29-year-old Daily Star discovery’s leggings clung to every curve, right, and proved a fantastic behind is a great way to get ahead.

But just what makes Kelly’s backside so bootylicious? Psychologist Dr David Holmes has come up with a formula to find out exactly that – and discover which celebs have rearly great curves.

His calculations include scores for shape (S), circularity or roundness (C), bounciness (B), firmness (F) and texture or cellulite (T).

HFinally, it takes into account a factor called V which is a woman’s hips/waist ratio –?the bigger the hips in proportion to the waist, the curvier a woman appears.

HAnd if the magic formula of (S+C) x (B + F)/(T – V) gives a score of 80, you’re looking at a perfect bum!

One celeb has achieved that cracking score – Aussie sexpot Kylie Minogue, 40.

“Kylie would score amazingly well on sphericality and symmetry,” says Dr Holmes.

H“Her bum is pretty much perfect in these areas – even more so than the likes of Kelly who works out at 74.”

So how does your favourite babe score??Our cheeky reporter NADINE?LINGE gets to grips with some celeb beauties to discover who is top of the bots…

JO GUEST: In her heyday this Daily Star favourite was regarded as having the best rump in Britain. Thank goodness Jo, now 37, wasn’t shy of showing it off.
SCORE?64

KYLIE MINOGUE: Everyone agrees Kylie, 40, has the best bum around. Now it’s finally been scientifically proven with a perfect formula score.
SCORE 80

CHANELLE HAYES; The 21 year old beauty is a close second to Kylie with her pert behind.
SCORE?76

LILY ALLEN; The 23-year-old singer is more Thrilly Allen in these knickers and stockings that show her bum to perfection.
SCORE?70

LUCY PINDER: Juicy Lucy, 25, is more often recognised for her fine treasure chest. But she’s also a nice bit of botty totty!
SCORE?62

What do you get when two chesty British press their together?
One of the greatest moments in history.
Ok that’s a stretch, but here are Lucy Pinder and Sophie Howard posing in Magazine.

IF the future looks like science fiction babe Lucy Pinder, we can’t wait to get old!

Lovely Lucy poured herself into a bikini, belt and boots to pay tribute to the latest must-have computer game getting geeks in a lather.

Lucy, 25, wore a combat visor from the eagerly-awaited first-person shooter game Killzone 2. See the pics in the paper today.

The 32G brunette babe can’t wait to jiggle a joystick or two now the sci-fi smash has hit the shelves.

Killzone 2 is the newest PS3 game which Sony hopes will put the console back on top in its battle with the Xbox 360 and Nintendo Wii.

Four years in the making, it is already being talked about as one of the games of 2009.

And we’ll never stop talking about lovely Lucy as one of the babes of this or any other year.

She has come a long way since being plucked from the Bournemouth surf by a sharp-eyed Daily Star photographer in 2003.

It’s no surprise that bigwigs in the Conservative party and BBC Question TIme bosses are queueing up to recruit her.

They were both wowed by her recent Celebrity Big Brother appearance.

But if they are eager to get the benefit of Lucy’s assets, they’ll have to get in the queue – behind an army of her Daily Star Sunday fans.

Killzone 2 is out now on Sony’s PlayStation 3.