The 20-year-old, who was the bookies’ favourite and the only girl in last night’s live final, looked shocked when her name was read out by the show’s host Davina McCall.

By beating Siavash Sabbaghpour, who polled three times fewer votes than the winner, she won a £71,320 prize fund.

“I never thought I’d win. I didn’t think I’d get on the show, let alone win,” Sophie, from Cheshire, said.

“I’ve never won anything in my life.”

The model, who wears a 30GG bra, told McCall that winning made her feel “really accepted”.

“Because I get my boobs out for a living people think I’m tacky, an airhead and I’ll have no personality.

“I think people can see past that,” she said.

Sophie said she would use her winnings hair extensions, a new flat and “maybe another boob job”.

She also denied she had sex with fellow housemate Kris Donnelly while in the house although the pair were seen sharing a bed.

“I can swear on my Chihuahuas’s lives I never,” she said.

Sophie spent much of her time in the house as Dogface after changing her name by deed poll in a task which gave her housemate status.

The model, who lives with her parents and two older brothers, lived up to the name when she got on all fours and impersonated her pet Chihuahuas, Army and Moo.

McCall said Sophie won £71,320 which had been returned to the prize fund when housemates completed tasks.

The remainder of the £100,000 prize money, which was taken away when the housemates tried to break out, would go to charity, McCall said.

Sophie said she planned to use the money for charity and clothes.

Siavash, 23, an events organiser who was born in Iran but moved to the UK as a child, had threatened to walk out yesterday but later decided to stay for the final day.

Last night, the croaky-voiced runner-up told McCall he had considered leaving to improve Sophie’s chances of winning.

McCall asked him about his feelings for former housemate Noirin Kelly who put the brakes on a romance with him when her ex-boyfriend entered the house. Noirin has revealed she was single again.

“She did nothing wrong,” Siavash said.

He also offered a public apology to ex-girlfriend Laura Cogoni for kissing Noirin.

“I’m sorry. I’m so, so sorry. Things are really weird in the house,” he said.

Third place in this series went to David Ramsden, a recycled clothing sorter and eBay retailer from Dewsbury, West Yorkshire, who told McCall he was feeling “bloody brilliant”.

Customer service advisor Charlie Drummond, from Newcastle, came fourth.

The housemates were not told that Channel 4 had recently announced that it planned to axe the show after the 11th series next summer.

:: Rodrigo

Age: 23

From: Brazil

Occupation: Student

Likes: Britain

Dislikes: British reserve

Bisexual Rodrigo wasn’t interested in men before he moved to the UK but now he dates an equal amount of men and women.

Rodrigo gained housemate status by being first to Diary Room and shaving Noirin’s eyebrows off.

During his time in the house, Rodrigo was greeted by a lookalike of the Queen as part of a Big Brother shopping task.

The ecstatic student was oblivious to the fact she was not the real Queen, as they politely enjoyed their tea party.

The “Queen” told Rodrigo he was a “very likeable young man”.

:: Charlie

Age: 22

From: Newcastle

Occupation: Customer service advisor

Likes: Working at the Job Centre

Dislikes: Frogs – he once left his two pet amphibians outside and tried to defrost them with a hairdryer

Charlie won the Newcastle heat of Mr Gay UK in 2007.

He said he was popular at school, is always the centre of attention and can often be found dancing on a stage or podium on nights out.

He walked across broken glass in the Special Forces task to gain housemate status.

He cried when Beinazir left and said: “I loved her, she was great.”

Charlie was a lady of the court in the Tudor task and enjoyed camping it up in his dress and learning to dance with Kris.

He was deprived of his nomination rights by King Siavash in week three and he and Halfwit shaved their heads in week five.

Earlier this week, Charlie and Rodrigo came to blows when Rodrigo offered his nemesis a mouthful of crisps.

Charlie said: “I’m not a crispy person, I wish people would remember that. Some people are and I’m not.”

:: Siavash

Age: 23

From: Iran, but he moved to the UK as a child

Occupation: Events organiser

Likes: Siavash is a self-confessed slave to fashion

Dislikes: Paying for anything himself

Siavash lives with his mum but mostly stays with friends. He dropped out of studying fashion at university, because he was surrounded by people without money.

He gained official housemate status after facing the public vote on the first Sunday.

Siavash was put up for eviction along with Sophie on day 39 for breaking the rules.

They had discussed nominations and then, after being told by Big Brother that they would automatically face the public vote if they swore before 3pm, they both uttered swear words.

He played a memorable part in the Italy-themed task, as the “fashionista” and had to dress up in crazy costumes and strike a pose whenever Big Brother played Madonna’s Vogue.

He has been teased by the others for being short but took it with good humour.

:: Sophie

Age: 20

From: Cheshire

Occupation: Glamour model

Likes: Barack Obama because “his daughters look cute”

Dislikes: The stereotypical “blonde bimbo” label

Sophie lives at home with her parents and two older brothers – and her two chihuahuas Army and Moo.

Her bra size is a 30GG, and she claims to be one of the lads, doing promotional work at motorbike shows.

Sophie regrets not going university because she gets jealous looking at her friends’ party photos on Facebook.

She changed her name to Dogface by deed poll to gain housemate status.

The model had a hair extension crisis when they started falling out – and when she pulled them out her hair started coming with it.

Ex-housemate Brian Belo fancied her when he came back to the house and complimented her “melons”, burying his face in them.

:: David

Age: 29

From: Dewsbury

Occupation: Recycled clothing sorter and eBay retailer

Likes: Fashion – especially Dame Vivienne Westwood, ex-housemate Pete Burns

Dislikes: Being labelled as “gay”

David, who gave his sister a car, claims that he’s unlucky in love, and is usually dumped.

He admits that he’s only been in love once in his life and vows that he will fall in love again.

While in the house, David received a card from his idol, Dame Vivienne.

He burst into tears, saying: “This means the world to me; it would be like meeting the Queen!”

The 20-year-old is one of five remaining housemates in the final showdown, alongside Siavash Sabbaghpour, Rodrigo Lopes, David Ramsden and Charlie Drummond.

William Hill made Sophie the 1/4 favourite to win and are also offering 8/1 odds that the glamour model will pose for Playboy in 2009.

The bookies put David as the hot favourite to be booted out first tonight at 4/9.

Sophie, who had a relationship with curly-haired Kris Donnelly while in the house, is also Paddy Power’s favourite and the bookmaker has chopped her odds from 5/4 to 2/9.

Meanwhile, former BB10 contestant Noirin Kelly has given Charlie her backing, saying: “I hope he wins, fingers crossed.

“He’s kept us entertained from the start to the end. He’s not been afraid to speak his mind, he’s funny, he’s been a nice guy as well.

“People say he’s too nice, but I actually think he’s a genuinely nice guy.”

Channel 4 said last week that it would not renew its deal with programme-makers Endemol when it expires next year, making next summer’s 11th series the last for the broadcaster.

Disappointing ratings for the latest series have scraped around the two million viewers mark, compared with 10 million in the show’s heyday.

Hills hope the final will see a turnover of £100,000, a mile away from the millions it said used to be wagered on the final night.

Kevin Lygo, Channel 4’s director of television, said previously that Big Brother had reached a “natural end”.

Presenter Davina McCall has told how she cried when she heard it was being axed.

McCall said previously: “I just felt really sad, I cried for a bit and my husband was being very nice to me all day.

“It was kind of a weird day, I felt like I was grieving the loss of a friend.”

McCall has also said that if she was allowed to next year, “I might streak through the house or something like that.”

Since its launch in 2000, Big Brother has been one of the UK’s biggest TV talking points, producing characters such as “Nasty” Nick Bateman and making a star out of the late Jade Goody.

Celebrity Big Brother will also return to the television once more in the winter.

Cancelling the show will release more than £50 million a year in Channel 4’s budget and the broadcaster said £20 million would be pumped into revamping the drama schedule.

All the housemates – Siavash, Sophie, Rodrigo, David and Charlie – were up for eviction.

Unemployed Lisa, 41, from Birmingham, was last night the 13th contestant to be evicted.

Lisa smiled and hugged fellow housemates when presenter Davina McCall broke the news.

Clutching her tobacco, she was greeted by loud boos from the waiting crowds as she left the house, but stopped to shake hands and wave at her fans.

She told McCall she was not upset to be missing out on Friday’s final. “I know it’s going to be buzzing and that but I feel like I’m lucky to get through to this week,” she said.

She added: “I thought I would be out two weeks after I went in. You never know when you’re in there what’s going to happen, the mood changes all the time.”

She also said she didn’t enjoy watching herself on television when Big Brother played the housemates an early episode from the series for a shopping task. “I thought, ’God, I sound really common’,” she said.

She added she thought she looked like the Austin Powers character Mini-Me when she was sitting in the diary room chair.

Earlier in the day Charlie and Rodrigo came to blows when Rodrigo offered his nemesis a mouthful of crisps.

Charlie said: “I’m not a crispy person, I wish people would remember that. Some people are and I’m not. I’m anything but a crispy person.”

It was announced on Wednesday that Channel 4 was dropping the show after next summer’s 11th series.

The move follows months of speculation about the programme’s future following disappointing ratings for the latest series.

McCall said: “This week has been such a shocker. I got a phone call from my producer saying that next year we were going to have the last Celebrity Big Brother, and indeed the last Big Brother.

“Even though I kind of knew it was coming to an end and that it gives Channel 4 an opportunity to try something else, and they’ve had a lot of flak for Big Brother in the past, I think they’ve been very brave to stick with it as long as they did.

“I just felt really sad, I cried for a bit and my husband was being very nice to me all day.

“It was kind of a weird day, I felt like I was grieving the loss of a friend.”

She said that next year would be “silly”.

“I think this is the only way to describe it.

“We’ll definitely go out with a bang. I certainly will be quite naughty, I’m not sure in what way or how but it could involve some shenanigans in the house or something, I want to go in the house really badly.

“Staying the night has been vetoed by my husband because sleeping is the only thing he really gets to see me do on my own.

“I definitely want to go in there at some point. I’m going to just really have a laugh with it and send it out with a proper bang!

“People are saying Big Brother’s over, but it’s a good format so I think it doesn’t necessarily have to be over, it can come back in another guise.”

Marcus was the latest contestant to be evicted from the house last night.

Siavash, who was also nominated, survived the public vote.

Marcus, 35, a carpenter from Brentford, was the 12th contestant to be evicted.

Siavash, who was also nominated, survived the public vote.

Marcus, 35, a carpenter from Brentford, looked relieved as presenter Davina McCall announced he would be the 12th contestant to be evicted.

He hugged fellow housemates before leaving the house to a mixture of cheers and boos. As he greeted the crowds fans began to cheer his name.

During an interview with McCall, Marcus said he was glad to leave the house and was not upset not to make it to the final week next week.

When asked why he didn’t walk out if he wanted to leave so much he said: “Because of how many people want to be in the house. You don’t know what it’s like when you’re in there.”

When questioned about his relationship with ex-housemate Noirin, the self-titled Irrepressible Dark Horse said: “I 99.9% knew nothing was going to happen but I was bored so I took the 0.01% chance.”

Earlier yesterday Rodrigo added £6,000 to the prize fund by correctly identifying animal sounds. The prize fund now stands at £6,020 after Big Brother wiped the amount down to zero when housemates staged a breakout.