The former TOWIE star - who made a guest appearance in the Christmas special - has worked hard to tone and improve her physique, shedding four dress sizes in the process.
So she has every right to be flaunting the results - especially with a new fitness DVD to promote!
Sharing a jaw-dropping new photo with her 578,000 Instagram followers, Lauren wrote: "So touched by all your lovely comments on my new bod! This is me on the set of my OMG! DVD shoot - see it works! #GetFitWithLG."
In the eye-popping snap, Lauren is wearing a neon coral vest over a gold bra and very skimpy matching shorts which show off her muscles.
Fans commenting on the photo described Lauren's figure as "amazing" and "hot".
One said: "If she can do it so can i!!!!! #thinspiration."
Just a day before, Lauren shared one of her trademark pouting selfies with the message: "Been practising my TOWIE pout lol! Thanks for all the messages about my weight loss after seeing me on show - it's all thanks to new fitness system my #OMG!Workout."
She was also thrilled to tell fans that her workout DVD has topped the fitness pre-order chart. Good going, Lauren!
After appearing in the festive episode of The Only Way Is Essex, co-star Gemma Collins and EastEnders actress Jacqueline Jossa both gushed about Lauren's new figure.
Making a brief return, Lauren was seen giving out love advice to Danielle Armstrong.
She said: "Being heartbroken is the worst feeling in the world. Every girl has been through it. We have all had that first love and the second one is completely different: you're happy and confident and don't put up with what you've been through before.
"I think that will be you, you'll get there, meet someone and think, 'This is what it feels like, this is real.'"
Lauren's fitness DVD Lauren's OMG! Workout is released on 26 December.
See the moment Lauren broke down over her weight issues in TOWIE:
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