The Great British Body - My how you've changed!

One thing the Great British Body survey has shown us is that bodies can change dramatically, through weight gain, weight loss or a whole host of reasons. Here are some celebs who've changed shape over the years... 

Katie Price has not only changed her shape, her image and her career, she's also changed names. The glamour girl, formally known as Jordan, was once a busty page 3 staple - but has since branched into writing, television, fashion and music.

The former EastEnders' star has been in the headlines after her dramatic weight loss. She claims there's no secret to her healthier look, she creates her own nutritious meals herself and visits the gym now and again.

He's gone from Batman to a bit of a fat man, but now former Hollywood heart-throb Val Kilmer is in his forties, he's allowed to let himself go a bit.

Sophie made her name as a pioneering plus-sized model, though her size was always an issue in the high pressure fashion world. In recent years she has slimmed down considerably and has turned her back on modelling completely.

Trouble attracting crooner Amy had developed her own distinctive style - with trademark beehive and elaborate eye make-up. But worries about her dramatic weight loss and stick-thin figure have dogged her in recent years.

The singing daughter of Beach Boy Brian Wilson and Wilson Phillips star has always had weight issues, travelling from a size 6 to a size 28 during her career. She eventually underwent gastric bypass surgery to control her food intake - the procedure was shown live on the internet. 

When Jack came to the world's attention in the fly-on-the-wall reality show The Osbournes he was a dumpy, sullen, hell-raising teen. But since he's developed a taste for extreme sports and adrenaline fuelled action - the pounds have dropped off him.

Jack's sister Kelly has also changed dramatically in recent years - developing from a snotty LA punk princess to style queen and host of Project Runway.

Hollywood star and part-time rocker Jared Leto gained the pounds to star as John Lennon's killer Mark Chapman in the film Chapter 27 and then effortlessly lost the weight again.

Jenna is considered the world's most famous porn star - but since retiring from the industry she's had her breast implants removed, reducing her from a D to a C cup. An entrepreneur as well as an actress, her Club Jenna business rakes in $30 million a year.

The Lord of the Rings and King Kong director was King Kong sized himself - blaming his weight gain to the constant availability of unhealthy snacks that litter film sets. He changed his diet from hamburgers to yoghurt and muesli and soon slimmed down.

Renee was another one to alter her size and shape dramatically for a film role - piling on the pounds for her turn as the hapless Bridget Jones. She claims to have found the weight gain difficult and uncomfortable, which added to her portrayal of the character.

Janet has become almost as famous for her yo-yo weight situation as her music career. She's reported to have put on an amazing 60 pounds at one point, but now credits nutrition and exercise for hersuccessful weight loss.

As the star of the original Hairspray, Ricki was known to be fat and proud. But she soon ballooned up to a size 24 and has been slowly reducing ever since. The talk show host is now a size 6 and puts her weight loss down to a healthy meal delivery service.