Chantelle Lewis had put down her sister's address on the entrance form Photo: BNPS
Chantelle Lewis, 17, had already been presented with the tiara and sash when the mothers of some rival contestants claimed she had cheated.
Chantelle stated in her application that she lived in Christchurch, in Dorset, in order to meet the rules for the Christchurch Snow Queen 2008 contest.
But the address was that of her sister who lives one mile away in neighbouring Bournemouth.
Judges realised the error 20 minutes after announcing the results and unceremoniously dethroned Chantelle in front of scores of people.
Her tiara was then given to runner-up Rebecca Allan, 14, while Chantelle left the stage in tears.
Chantelle said: "When I won, they put the tiara on me and gave me the gifts and I had all the pictures done.
"But then they said they were taking the title away. I've never been so humiliated in my life and I just burst out crying after all the excitement.
"They shouldn't have allowed me to go on stage if they thought I was in the wrong."
The unseemly episode happened after Chantelle entered the winter beauty pageant in Christchurch.
She was asked to put her address on the application form so wrote her sister Sam's address in Christchurch.
However, the correct address for the property is Bournemouth.
In total, 28 girls entered the contest and Chantelle won the title based on her appearance and ability to talk on stage.
But within 20 minutes of being crowned, furious mums complained to the panel of five judges that the winner didn't live in Christchurch.
Lillian Jefferis, organiser of the event, said: "Very plainly in the rules it states that every entrant must live in Christchurch to enter.
"Chantelle Lewis used a fictitious address on the form in order to meet this rule.
"After we had crowned her as the Snow Queen, three mothers came up and said she didn't live in Christchurch at all.
"Then more people came up saying they knew her and that she didn't live here.
"I know every road in the town but this year another volunteer on the committee went through the applications.
"She saw the address was filled in as Christchurch and had a BH23 postcode so thought nothing of it until it was pointed out to us."
Mrs Jefferis added: "Chantelle's mother wasn't at the contest so I asked both her and her younger sister where they lived.
"But they said they couldn't remember and shrugged their shoulders.
"We quietly found the runner-up Rebecca and asked her to sit on the throne and re-crowned her as we didn't want to embarrass anyone.
"I imagine three quarters of the people there didn't even notice but Chantelle has caused quite a fuss.
"It is very disappointing as everything had gone well and the girls had behaved beautifully."
One mum, who didn't want to be named, said: "Her family is quite known to the beauty pageant circuit so the mums realised this as she was being made the queen. There was a lot of animosity."
Chantelle's mum Tracy, 44, said her daughter had done nothing wrong and that the judges should have spotted the error in the application.
Mrs Lewis, of nearby West Parley, said: "Chantelle used her sister's address which is on the border of Christchurch as she lives there most week nights.
"Two years ago she was made attendant in the Christchurch Carnival Queen competition so we really didn't think there would be a problem.
"When Chantelle won they put her on a throne, gave her the prizes and built her up for 20 minutes.
"But then people began complaining and they grabbed her tiara off her and gave it to someone else in front of everyone.
"They humiliated my daughter but she managed to hold it in until she left the building before she phoned me crying her eyes out.
"If there was a problem with her form then they should have spotted it before - we would never ever try to mislead or deceive people.
"The organisers didn't do their job properly and ended up making my daughter feel terribly unhappy."
Teenage beauty queen stripped of title over village row - Telegraph