The reality star is now looking toned and fab and her fitness DVD has become a huge hit
She went from a size 16 to a size eight in just SIX months and has become an inspiration for women trying to loose weight.
And Geordie Shore's Charlotte Crosby was clearly not sat overeating this Christmas as she showed off her incredible stomach muscles in a selfie on Instagram.
The 24-year-old star wore an eye-popping tight neon crop top and matching green and black tiny shorts for the revealing snap, which she added to a collage of photos from her gym shoot session.
Charlotte wrote underneath the pic: "BTS on shoot day #3MinBellyBlitz big thanks to @myfitnesstrainer@richcallender and a special thanks to @reebokuk for kitting us out #BestTrainersEver #Green #FitFam."
It seems she's become a real gym bunny and in one picture she features along with fitness trainers Richard Callender and David Souter.
The star's fitness DVD, 3 Min Belly Blitz, has been a huge hit with women wanting to shed the pounds like the reality star and she continues to post images of when she had a fuller figure to show her amazing transformation.
Charlotte has blamed her yo-yo dieting for her weight gain in the past and says she feels a lot better now she's slimmed down and eats more healthily as well as exercising.
Talking about her DVD, she said: "I'm proof it works and I can't wait to reveal my new body and the secrets behind my weight loss.
"It's hard on the show because we film for six weeks at a time and it involves constant drinking and eating pizzas and kebabs. It's nearly impossible not to put on weight.
"I know I've been naughty with my diet, even when I'm not filming. I just love junk food. I can't drive past a McDonald's without going in for a burger and fries.
"I'd love to tone up and get back to a size 10, but it's not easy."
