REALITY star Lucy Mecklenburgh has revealed she lost an incredible TWO stone during her time on TV show Celebrity Island.
The ex-Towie beauty tweeted dramatic before and after lingerie shots as the final episode of the Bear Grylls survival show aired tonight.
She told the Mirror she lost "about two stone" while filming the show after ensuring she piled on a few pounds before jetting out to the tropical location for filming.
She said: "I was told you should get used to eating less and less but then the I was told: 'No, no, no you need to put on some weight. So I put on half a stone.
"It was weird because when you're there you don't really feel as thin as you are because you don't have a mirror so you don't really know how tiny you are and then you get back and you realise."
Lucy stunned fans by tweeting before and after pictures on Twitter which displayed her tiny waist.
She wrote alongside the snap: "So emosh watching the last ep of Celebrity Island! I'll never doubt myself again!
"Met some incredible people that will be friends for life!"
But the svelte star added in her caption it only took "three weeks to put the weight back on" after leaving the show - which was filmed back in May.
However, she was forced to hit back at a section of fans who commented that she looked too thin in her "after" selfie.
She wrote: "Read the caption guys! I went back to my original weight in 3 weeks!
"I looked gross by the end of The Island & was very weak. It's just to show how brutal it was."
Lucy also found love on the show - her romance with soap star Ryan Thomas is still going strong.
Shortly after the episode, he also shared his jaw-dropping weight loss in a similar before-and-after shot.
Alongside his ripped snap he wrote a lengthy caption which read: "The Final episode tonight everyone. The journey we've been on is indescribable. "Not even a television show can put into perspective how mentally and physically we got tested on this island. My before and after is an example of the lack of food, 8 days no eating trying to survive with so little energy.
"I'm extremely proud of myself and my fellow islander. Couldn't have done it without you guys. The reason I love this show so much is because unlike any other there is no winner, it is a matter of survival and not about competing against each other."
Meanwhile, reality TV viewers saw sparks fly between the pair on tonight's final.