The Only Way Is Essex star showed off her curves and tanned skin as she strutted around the pool in her tiny two-piece in Spain earlier this week.
The 24-year-old even seemed to check out her own assets as she climbed out of the pool after taking a dip.
But despite making the most of the heat, Lauren didn't look overjoyed to be in the sunshine.
She barely raised a smile as she showered after her swim and applied more suntan lotion.
Lauren, who is engaged to Mark Wright, was in the Costa del Sol by herself for short break during a gap in filming for the ITV2 show.
The current second series is about to end and will see the Essex gang head to their favourite destination, Marbella, Spain - or as they like to call it, 'Marbs'.
She recently told how she was trying to shed pounds before baring her body for the show when it films overseas - and her efforts seemed to pay off as she flaunted her slim figure.
Her straight-talking fiancé was recently seen telling her that she's "let herself go" and that she needed to get in shape on the show.
Talking about her weight, Lauren said: "I'm one of those people who loses weight quickly, but puts it on just as quickly. If I train and eat healthily you can notice, and if I drink and eat rubbish you can notice.
"I'm being healthy now and use a personal trainer, Nikki Diamond, who was Scorpio on the TV show Gladiators.
"I'm much more toned, and I feel so much more confident in a bikini when I've been working out."
She added: "Thankfully, my tummy stays quite flat but extra weight shows on my arms, face and legs. I've got Beyoncé thighs, but Mark says they're sexy."
TOWIE fans saw Mark, 24, and Lauren go head-to-head against Amy Childs, 20, and James 'Arg' Argent, 22, in a tennis doubles match on Sunday's episode of the show.
The nightclub owner told his fiancée and his best pal Arg that they both needed to do more exercise to lose weight.
-via The Sun