Natalie Carroll was a houseguest in Big Brother 5. As a part of Project DNA, she switched places in the Big Brother House with her identical twin sister Adria Klein for the first four weeks, and because they pulled off their deception, Natalie was let into the house to play her own game. After Natalie and her sister turned on the Pinky Swear Alliance, both were nominated against each other. When Adria won the POV, her fate was sealed and she was evicted in a 4 to 1 vote, only receiving the vote of her sister, becoming the second member of the jury
During the Week 5 HOH competition, Natalie infamously cheated when Julie Chen had asked a true/false question and got it wrong, but Julie had mistakenly forgot to tell her she had been eliminated, thus she reset her answer and continued playing. She was eventually eliminated on the next question.