The former TOWIE star, 28, clearly enjoyed dressing up so much, she couldn't resist posting a string of selfies as she attended a spooky fancy dress party.
However, in one snap she suffered an embarrassing wardrobe malfunction - and was flashing her nipple!
Seeming not to care, the reality star posted the picture on to her Twitter and Instagram accounts in the early hours of Saturday morning (1 November), which quickly provoked her followers to comment.
While some loved Lauren brazen attitude, others were quick to criticise.
Lauren took the image down later the same day, even though she had warned her Twitter fans the previous night saying: "Just 2warn u, im prob going be tweeting a few belfies in my hotel suite 2night so if you don't want c, be warned to look away #TrickOrTreat."
She also posted more provocative snaps of herself in her racy Halloween outfit, including one in the back of a taxi with the caption: "Oh dear, en route."
Lauren wore a ripped black top over a PVC bra, which she teamed with tiny PVC shorts, fishnet tights and knee-high boots.
She also wore ghoulish face make-up, and wore one coloured contact lens to complete the spooky look.
Celebrity Big Brother star Lauren was attending KISS FM's special Haunted House party in London.
In the morning, clearly nursing a sore head, Lauren took to Twitter to thank her hotel for a much needed night's rest.
She said: "Morning! Absolutely hanging after a wicked night. Waking up in an amazing bed at the lush @ChelseaHarbourH helps though!"
She also joked: "U no them ones when girls/guys look hot on Insta N u meet them there rough, with me it's the other way round."
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