Jesy Nelson of Little Mix has been showing off the results of her hard work in the gym after losing a whopping two stone in the last year.
Just look at that washboard stomach!
Jesy Nelson
The singer - who won 'The X Factor' in 2011 as part of Little Mix - is now a tiny size six after hitting the gym hard and sticking to an uber healthy diet.
The 22-year-old Tweeted the above snap of her wiped out on the gym floor after another gruelling two hour training session.
Jesy was a size 10-12 during her time on 'X Factor' in 2011
Jesy came in for a lot of stick over her weight during Little Mix's time on 'The X Factor' but she hit back at critics, insisting she was happy being a size 10-12.
"When you’ve got your own insecurities and then people write them on websites for everyone to see, it just makes you feel really rubbish," she said. "Obviously, I know I’m a lot bigger [than the other girls].
"The comments really got to me. I knew I’d get nasty stuff said about my weight from the start. But it’s not until you actually see it that it hits you.
"I thought I’d be alright and then I saw it and just burst out crying ... I’m a size 10-12. I know that I’m not fat. I’m not going to change."
Looks like someone had a change of heart.
Little Mix
BBC Radio 1's Teen Awards - London(01 of36)
Little Mix performing at the BBC Radio 1 Teen Awards at Wembley Arena. (credit:PA)
Little Mix Launch Their Press On Nail Collection - Photocall(02 of36)
LONDON, ENGLAND - APRIL 12: Leigh-Anne Pinnock of Little Mix poses at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
Little Mix Launch Their Press On Nail Collection - Photocall(03 of36)
LONDON, ENGLAND - APRIL 12: Perrie Edwards of Little Mix poses at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
Little Mix Launch Their Press On Nail Collection - Photocall(04 of36)
LONDON, ENGLAND - APRIL 12: Jesy Nelson, Leigh-Anne Pinnock, Perrie Edwards and Jade Thirwall of Little Mix pose at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
Little Mix Launch Their Press On Nail Collection - Photocall(05 of36)
LONDON, ENGLAND - APRIL 12: (L-R) Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirwall of Little Mix pose at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
Little Mix Launch Their Press On Nail Collection - Photocall(06 of36)
LONDON, ENGLAND - APRIL 12: Jesy Nelson, Leigh-Anne Pinnock, Perrie Edwards and Jade Thirwall of Little Mix pose at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
Little Mix Launch Their Press On Nail Collection - Photocall(07 of36)
LONDON, ENGLAND - APRIL 12: (L-R) Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirwall of Little Mix pose at a photocall to launch their collection of press on nails for New Look at Westfield on April 12, 2013 in London, England. (Photo by Ben A. Pruchnie/Getty Images) (credit:Getty Images)
National Television Awards 2012 - Press Room - London(08 of36)
Jade Thirlwall, Leigh-Anne Pinnock, Jesy Nelson and Perrie Edwards of Little Mix backstage at the National Television Awards 2012 at the Greenwich Arena London. (credit:PA)
National Television Awards 2012 - Arrivals - London(09 of36)
Leigh-Anne Pinnock, Perrie Edwards, Jesy Nelson and Jade Thirlwall of Little Mix arriving for the 2012 NTA Awards at the O2, Greenwich, London (credit:PA)
National Television Awards 2012 - Show - London(10 of36)
Leigh-Anne Pinnock of Little Mix performs on stage during the 2012 NTA Awards at the O2, Greenwich, London (credit:PA)
Nickelodeon's 26th Annual Kids' Choice Awards - Arrivals(11 of36)
LOS ANGELES, CA - MARCH 23: (L-R) Singers Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson of Little Mix arrive at Nickelodeon's 26th Annual Kids' Choice Awards at USC Galen Center on March 23, 2013 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images) (credit:Getty Images)
Nickelodeon's 26th Annual Kids' Choice Awards - Red Carpet(12 of36)
LOS ANGELES, CA - MARCH 23: (L-R) Singers Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson of Little Mix arrive at Nickelodeon's 26th Annual Kids' Choice Awards at USC Galen Center on March 23, 2013 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for KCA) (credit:Getty Images)
Nickelodeon's 26th Annual Kids' Choice Awards - Red Carpet(13 of36)
LOS ANGELES, CA - MARCH 23: (L-R) Singers Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson of Little Mix arrive at Nickelodeon's 26th Annual Kids' Choice Awards at USC Galen Center on March 23, 2013 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for KCA) (credit:Getty Images)
Capital FM's Jingle Bell Ball - Saturday - London(14 of36)
Jesy Nelson, Jade Thirlwall and Leigh-Anne Pinnock of Little Mix backstage on Day 1 of the Capital FM Jingle Bell Ball in London. (credit:PA)
Brit Awards 2013 - Arrivals - London(15 of36)
Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwell of Little Mix arriving for the 2013 Brit Awards at the O2 Arena, London. (credit:PA)
Brit Awards 2013 - Red Carpet Arrivals(16 of36)
LONDON, ENGLAND - FEBRUARY 20: Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirwall of Little Mix attend the Brit Awards 2013 at the 02 Arena on February 20, 2013 in London, England. (Photo by Eamonn McCormack/Getty Images) (credit:Getty Images)
Jingle Bell Ball - Day 1(17 of36)
LONDON, UNITED KINGDOM - DECEMBER 08: Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlall of Little Mix attend the Capital FM Jingle Bell Ball at 02 Arena on December 8, 2012 in London, England. (Photo by Fred Duval/Getty Images) (credit:Getty Images)
BBC Children In Need - London(18 of36)
Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall of Little mix on stage live during BBC Children In Need, London (credit:PA)
BBC Children In Need - London(19 of36)
Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall of Little mix on stage live during BBC Children In Need, London (credit:PA)
BBC Children In Need - London(20 of36)
Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall of Little mix on stage live during BBC Children In Need, London (credit:PA)
Bershka Flagship Store Launch Party(21 of36)
LONDON, ENGLAND - NOVEMBER 14: Perrie Edwards of Little Mix performs at the launch of the Bershka flagship store on November 14, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images) (credit:Getty Images)
Bershka Flagship Store Launch Party(22 of36)
LONDON, ENGLAND - NOVEMBER 14: Jesy Nelson of Little Mix performs at the launch of the Bershka flagship store on November 14, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images) (credit:Getty Images)
Bershka Flagship Store Launch Party(23 of36)
LONDON, ENGLAND - NOVEMBER 14: (L-R) Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall of Little Mix performs at the launch of the Bershka flagship store on November 14, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images) (credit:Getty Images)
Bershka Flagship Store Launch Party(24 of36)
LONDON, ENGLAND - NOVEMBER 14: Leigh-Anne Pinnock of Little Mix performs at the launch of the Bershka flagship store on November 14, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images) (credit:Getty Images)
'Little Mix' Perform Instore In Melbourne(25 of36)
MELBOURNE, AUSTRALIA - NOVEMBER 01: Jade Thirlwall, Leigh-Anne Pinnock, Perrie Edwards and Jesy Nelson of 'Little Mix' perform for fans at Eastland Shopping Centre on November 1, 2012 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images) (credit:Getty Images)
'Little Mix' Perform For Sydney Fans(26 of36)
SYDNEY, AUSTRALIA - OCTOBER 29: Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson of 'Little Mix' pose at Luna Park on October 29, 2012 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images) (credit:Getty Images)
'Little Mix' Perform For Sydney Fans(27 of36)
SYDNEY, AUSTRALIA - OCTOBER 29: Perrie Edwards of 'Little Mix' performs on stage during a fan day at Luna Park on October 29, 2012 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images) (credit:Getty Images)
'Little Mix' Perform For Sydney Fans(28 of36)
SYDNEY, AUSTRALIA - OCTOBER 29: Jade Thirlwirl of 'Little Mix' performs on stage during a fan day at Luna Park on October 29, 2012 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images) (credit:Getty Images)
The X Factor(29 of36)
X Factor contestants Little Mix pose with fans as they arrive for a gig at Temple Park leisure centre in South Shields. (credit:PA)
Little Mix single launch(30 of36)
X-Factor winners Little Mix, (left-right) Jade Thirlwall, Jesy Nelson, Leigh-Anne Pinnock, and Perrie Edwards with their debut single Cannonball, at HMV in South Shields south Tyneside. (credit:PA)
The X Factor(31 of36)
X Factor contestants Little Mix with their mentor Tulisa Contostavlos (centre) arrive for a gig at Temple Park leisure centre in South Shields. (credit:PA)
Little Mix win X Factor(32 of36)
X Factor winners Little Mix outside the Corinthia Hotel, London. PRESS ASSOCIATION Photo. Picture date: Monday December 12, 2011. The group said they plan to write their own songs and insisted they would not be girl group "clones". The foursome, who were propelled to stardom last night when they won the ITV1 talent show, thanked their fans and said they had "made our dreams come true". See PA story SHOWBIZ XFactor. Photo credit should read: Rebecca Naden/PA Wire (credit:PA)
The Sun Military Awards - London(33 of36)
Perrie Edwards, Jesy Nelson, Leigh-Anne Pinnock and Jade Thirlwall of Little Mix attending The Sun Military Awards at the Imperial War Museum, in Lambeth, London. (credit:PA)
Hugo Royal Premiere - London(34 of36)
Jade Thirlwall, Perrie Edwards, Leigh-Anne Pinnock, and Jesy Nelson of Little Mix arrive for the Royal Film Performance 2011 of Hugo at the Odeon Cinema in Leicester Square, London. (credit:PA)
Cosmopolitan Ultimate Women Awards - London(35 of36)
Jade Thirlwall, Perrie Edwards and Leigh-Anne Pinnock of Little Mix, with mentor Tulisa Contostavlos (middle) at the Cosmopolitan Ultimate Women Awards at Banqueting House, Whitehall, London. (credit:PA)
The Twilight Saga: Breaking Dawn: Part One UK Premiere - London(36 of36)
Tulisa Contostavlos (centre) with Little Mix (left to right) Leigh-Anne Pinnock, Jade Thirlwall, Jesy Nelson and Perrie Edwards arriving for the UK premiere of The Twilight Saga: Breaking Dawn Part 1, at the Westfield Stratford City, Stratford, London. (credit:PA)
Weight Loss Stars
(01 of19)
Former '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)
At her thinnest Natalie wanted the whole world to know she'd lost weight. An inevitable work out DVD followed. (credit:Rex)
(03 of19)
The 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)
Gastric-band-gate swept the nation when it was revealed Fern hadn't exactly told the truth about her weight loss. (credit:Rex)
(05 of19)
Dawn 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)
That picture on the left actually scares us. It's like she wants us to motorboat in that cleavage. Bleugh. (credit:Rex)
(07 of19)
Bristolian comic Justin Lee Collins has gone from rock-sized to rock star after dieting. (credit:Rex)
(08 of19)
Former Emmerdale actress Pauline Quirke lost several stone after being told she was morbidly obese. (credit:Big)
(09 of19)
It 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)
He'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)
James Corden's role in One Man Two Guv'nors helped him to shift over five stone. (credit:WENN)
(12 of19)
TOWIE'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)
Pete'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)
Eh up, don our Kerreh look slim. Must 'av been on t'Weight Watchers. (credit:Big)
(15 of19)
Jack Osbourne has struggled a lot with his size and is still yo-yoing with his weight now. (credit:Big)
(16 of19)
Gerard Butler has never exactly been a porker, but he's swapped his stocky frame for a much leaner one. (credit:Big)
(17 of19)
Jessie Wallace looked unrecognisable after slimming down, but since returning to Easties, Jessie has regained Kat's curvier figure. (credit:Big)
(18 of19)
Superbad 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)
The once teeny weeny, leather-chaps wearing Christina Aguilera got tongues a-wagging when she ditched her slight frame. (credit:WENN)