Steven Goode, the Big Brother contestant from Bushey, has been nominated for eviction this week.
After discovering he will face the public vote on Friday, the young businessman broke down in tears.
The 23 year-old was selected by anonymous power housemate Chris Wright alongside Pauline Bennett and Christopher Hall on Sunday.
Talking about the shock discovery, Steven said: "I'll have my time with the person who has done it. And I'll expose them."
While the rest of the housemates were asleep, Steven said in the diary room: "I feel betrayed and I don't know why. I can't wait to find out who it is.
"I think people have picked people's weaknesses. I have a thick skin and a strong backbone, but there are people who need to be exposed."
Steven is currently 50/1 to win the series.