Lauren, 28, broke down on last night's Celebrity Brig Brother, after she tried to explain to fellow housemate George Gilbey, 30, that she is constantly scrutinised since shooting to fame on TOWIE four years ago.
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But Maria took to Twitter to slam boutique owner Lauren, writing: "I KNEW the arrogance would come out soon. She does think she's really really credible and famous. #CBB"
Maria then added: "Lauren thinks she's Katie Price."
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Lauren was seen in the latest episode telling George Gilbey he didn't understand what she had to deal with as he is only newly famous.
She said: "I've done this for four years. This is a new and amazing thing for you. I've had sh*t to deal with for four years."
While Maria certainly wasn't the only person to be outraged by Lauren's comments, many others leapt to the Essex girl's defence.
One Facebook user wrote: "I think she's a young girl screaming inside for acceptance from the public she may do or say stupid things but don't we all [sic]"
Another added: "She's just a young girl who's heart is broken. BB probably wasn't the best choice for where she is at in her life. She's not a bad person she's just young & got a lot to deal with in her private life."
Following her fall-out with George, Lauren was comforted by Edele Lynch as she broke down, unable to understand why he'd suddenly turned on her.