Cairon Austin-Hill has become the last official 'Big Brother' housemate.

The 18-year-old student took part in Big Brother's biscuit dunking challenge yesterday (06.06.09) - which saw all non-housemates competing to see who could hold a biscuit in a cup of tea for the longest without it breaking - and was delighted to hear he had won the

coveted spot.

Cairon said: "It's all in the biscuit. I used a digestive. I eat digestives all day."

Siavash Sabbaghpour, Angel Mckenzie, Sophia Brown, Beinazir Lasharie, Marcus Akin and Sree Dasari also competed in the challenge, but as

they didn't win they are now up for the public vote ahead of tonight's live eviction show (07.06.09).

Ciaron's chocolate-covered biscuit survived for 25.5 seconds after being immersed in tea.

Events organiser Siavash was just beaten into second place, after he managed 25.1 seconds. Angel was next with 21.1 seconds, while Sophia managed 16.7 seconds.

Beinazir's biscuit crumbed after 11 seconds, Marcus' lasted for 8.3 seconds - although the 35-year-old carpenter insisted it had held out

for "longer than that" - with Sree taking last place with 7.8 seconds.

Later, the pressure of being up for eviction became too much for Sree - who claims he is a virgin - and he broke down during a chat in the

Diary Room.

He cried: "I'm really scared I might lose my confidence. We have had very good fun but after this my confidence is going. I feel like I'm

losing. I lost the happiness. Everyone is hugging and saying, 'We love you,' but I'm very, very upset.

"Everyone here, I love them so much. I'm doing fake talent show and I'm flirting with girls. I'm enjoying it."