Chantelle Houghton said she was 'living the dream'
The "fake" celebrity beat entertainer Michael Barrymore into second place in the live final on Friday night.
The 22-year-old was allowed to stay in the Channel 4 show after fooling fellow housemates she was a famous singer.
Chantelle took 56.4% of viewers' votes, with entertainer Michael Barrymore polling 43.6% to come second.
Former Baywatch actress Traci Bingham and singers Pete Burns, Preston and Maggot were also finalists.
Chantelle, a model from Essex, said she believed the public had voted for her because she was "down to earth".
I'll never change. I'm just little old me
Winner Chantelle Houghton
In pictures: Big Brother Final
A visibly shocked Chantelle walked away with a cash prize because she entered the show as a non-celebrity. The other contestants would have seen any winnings going to their chosen charity.
More than £450,000 was raised for charity during the contest, with three million votes cast by the public by phone and text message.
When asked at a press conference what she would do with her winnings Chantelle replied: "That's a lot of money, a hell of a lot of money. I really don't know. It hasn't sunk in that I'm actually getting it.
"First I will be able to pay the debts I owe my mum; once that's out of the way I don't know, go shopping.
"Make up, clothes, orange lipstick - I need one of them, I love that. I've got to make sure I get a stock of that.
"I would like to take my mum and everyone on holiday because that would be a nice thing to do."
Not ashamed
Respect MP George Galloway was booed by the crowd when he returned for the final on Friday.
The politician, who had caused controversy by appearing on the reality show, was evicted on Wednesday.
Mr Galloway later defended his appearance, telling the BBC he had done nothing to be ashamed of.
Mr Galloway had defended his appearance on the show
Mr Barrymore returned to the UK to take part in the show having left to live in New Zealand following the media furore surrounding the death of Stuart Lubbock in his swimming pool in 2001.
During the series, an attempt was made to serve Mr Barrymore with documents relating to a legal action being brought over the death, but producers Endemol refused to accept them.
After leaving the Big Brother house, he was close to tears when interviewed by host Davina McCall.
He said he did not know what his plans for the future were, but added: "I've got me back. This is all extras."
The other celebrities who took part in the series included glamour model Jodie Marsh, former Football Association secretary Faria Alam, actress Rula Lenska and US basketball player Dennis Rodman.
Chantelle Houghton has won the British reality TV show Celebrity Big Brother. Michael Barrymore came in second place. 

Houghton, 22, was the only non-celebrity on the show and was given a secret mission for four days by Big Brother to convince the other housemates she was a member of the fictional band "Kandy Floss".

The television show, aired on Channel 4 in the United Kingdom is a spin off of the popular series shown around the world. This series of the show started on 5 January 2006 and lasted for 23 days. There were 11 housemates, six of whom were evicted on the 27 January 2006. 

Unknown to either the audience nor the winner until her exit interview, Houghton won £25,000 for winning the show and not being a Celebrity. 

Also evicted on the 27th were: 
*Chantelle Houghton (non-celebrity promotions girl and Paris Hilton look-a-like) - Winner 
*Michael Barrymore (television broadcaster and comedian) - Runner Up: 2nd Place 
*Maggot (member of Goldie Lookin' Chain) - Runner Up: 3rd Place 
*Samuel Preston (lead singer of The Ordinary Boys) - Runner Up: 4th Place 
*Pete Burns (former Dead or Alive singer) - Runner Up: 5th Place 
*Traci Bingham (actress from Baywatch and model) - Runner Up: 6th Place