(01 of19)
Open Image ModalFormer 'Loose Women' star Denise Welch lost over two stone after becoming the face of LigherLife and taking up a new fitness regime in 2013.
(02 of19)
Open Image ModalAt her thinnest Natalie wanted the whole world to know she'd lost weight. An inevitable work out DVD followed. (credit:Rex)
(03 of19)
Open Image ModalThe Steps singer managed to shed the weight she gained after the band split, but then she fell pregnant and battled to lose it since. (credit:Rex)
(04 of19)
Open Image ModalGastric-band-gate swept the nation when it was revealed Fern hadn't exactly told the truth about her weight loss. (credit:Rex)
(05 of19)
Open Image ModalDawn French was always been known for being a bit on the larger side, and that's why we loved her. Well, there's less of her to love now as since her split with Lenny she's shed a fair few pounds. (credit:WENN)
(06 of19)
Open Image ModalThat picture on the left actually scares us. It's like she wants us to motorboat in that cleavage. Bleugh. (credit:Rex)
(07 of19)
Open Image ModalBristolian comic Justin Lee Collins has gone from rock-sized to rock star after dieting. (credit:Rex)
(08 of19)
Open Image ModalFormer Emmerdale actress Pauline Quirke lost several stone after being told she was morbidly obese. (credit:Big)
(09 of19)
Open Image ModalIt was revealed that Geri's dramatic weight loss was due to an eating disorder. Luckily she's settled back to a healthy weight now. (credit:Rex)
(10 of19)
Open Image ModalHe's the man of the moment on The X Factor, but after the original Take That split Barlow ballooned. (credit:Wire Image / Big Pictures)
(11 of19)
Open Image ModalJames Corden's role in One Man Two Guv'nors helped him to shift over five stone. (credit:WENN)
(12 of19)
Open Image ModalTOWIE's Gemma shed four stone on a bid to win Mick Norcross. She gave up the bags of crisps but didn't manage to bag the bloke. Good job she's got Arg now then. (credit:Big)
(13 of19)
Open Image ModalPete's frame isn't the only thing shocking here. WTF is with that hair? Anyway, Pete shed the pounds when he split with Jordan. We didn't hear anything about that? (credit:Big)
(14 of19)
Open Image ModalEh up, don our Kerreh look slim. Must 'av been on t'Weight Watchers. (credit:Big)
(15 of19)
Open Image ModalJack Osbourne has struggled a lot with his size and is still yo-yoing with his weight now. (credit:Big)
(16 of19)
Open Image ModalGerard Butler has never exactly been a porker, but he's swapped his stocky frame for a much leaner one. (credit:Big)
(17 of19)
Open Image ModalJessie Wallace looked unrecognisable after slimming down, but since returning to Easties, Jessie has regained Kat's curvier figure. (credit:Big)
(18 of19)
Open Image ModalSuperbad actor Jonah Hill made jaws drop across the world when he unveiled his new look at an awards bash. He's hoping to lose more too. (credit:Big)
(19 of19)
Open Image ModalThe once teeny weeny, leather-chaps wearing Christina Aguilera got tongues a-wagging when she ditched her slight frame. (credit:WENN)