The former TOWIE star, 28, has been keeping her fans updated on her attempts to get fit and healthy - and we have to say it's working!
Lauren looks great!
Pregnant Billi threw a baby shower on Sunday (3 May) with some of her closest friends around her, including TOWIE pals Lauren, Cara Kilbey and Frankie Essex.
And while all the ladies looked stunning - as usual - Lauren's transformation made our eyes pop!
Wearing a strappy and clingy dress, it's clear that Lauren's fitness regime is paying off.
Sharing several pictures of Billi's special day, Lauren wrote: "At Billi BabyShower #NoFilter #cosMyGirlsAreHot."
Lauren, who is reportedly releasing a fitness DVD, was horrified last year when photographs of her in a bikini looking like a "beached whale" emerged.
She vowed to change her diet and lifestyle and has been sharing pictures of her gym workouts online.
Earlier this month, she wrote: "I'm going bring you on my journey... But one thing girls... skinny doesn't mean FIT something you can't deny... I'd rather be fit and healthy any day #honest#reallove."
She also shared photos of her working out with the message: "Not stopping until I'm ripped 50 reps #keepwatching#mygoal."
She added: "You are stronger than you think. each day I'm in competition with the person I was yesterday, I'm my biggest challenge .. #fit #body #routine #dedicated#discipline #goals #nevergivingup."
At the baby shower, Billi revealed she is expecting a baby boy.
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