The 28-year-old took to the social networking site to share pictures of her Halloween costume – but ended up sharing a lot more.
Former TOWIE star Lauren was wearing a slashed black top, tiny PVC shorts and fishnet tights for the occasion and, doing what Lauren does best, she uploaded a few selfies to show her outfit off.
But in one, her top had slipped to reveal her nipple.
Lauren's followers seemed divided in opinion over the nip-slip selfie. One simply demanded 'Where's the self-respect?'
But another sympathised, writing: "She must be hurting really bad. These nasty comments aren't going to help her. She seems like a girl suffering from a lot of insecurities and a broken heart."
Meanwhile it seems the nipple picture could be the beginning of much raunchier pictures from the Celebrity Big Brother star.
A source close to Lauren told Closer this week that she could be planning to pose topless for her fans.
They said: "Lauren has told pals her sexy pictures give her the confidence boost she desperately needs. She jokes about her obsession with taking revealing selfies but says they help her to believe in her sex appeal."
Read the full story in this week's Closer Magazine, out now.