Uva, right, accused Santana of being a cheat Photo: SplashNews.com

Brazil’s Miss Bumbum contest turned nasty when a woman who was favourite to win failed to make the top three and threw a tantrum on stage.

Ellen Santana, 31, scooped the top prize at the sexiest backside competition at the grand finale of the world famous competition in São Paulo.

But before the surprise winner was able to give her victory speech, bitter rival Aline Uva ran on stage and ripped the winner’s ribbon from her body.

Amid boos and catcalls from the crowd and other contestants she then launched into a tirade against the winner accusing her of having a “plastic” bottom.

Aline, representing Rio Grande do Sul state, came into the Miss Bumbum final as favourite to clinch the title after polling the most online votes.

But a panel of judges in the live final placed her twelfth.

Aline, 27, who refused to give back the winner’s ribbon, later told journalists: “I’m the only woman who deserves to be the winner.

"I played by the rules, and my bumbum is 100 per cent natural, unlike the winner who has a plastic bottom.

“Miss Bumbum is a complete farce, and I’ve proved it. If it was a serious competition I would have won.”

Winner Ellen later denied she had enhanced her 105cm-wide bottom with surgery, saying: “She took my ribbon but she can never take away my title.

“I deserve this title because my butt is the firmest. But it’s not just about the bottom, it’s about character too, which I have and she doesn’t.

Aline Uva demanded that she should be crowned the rightful winner of the contest Photo: SplashNews.com

“Now I want to be an inspiration to women around the world, to show them that they can achieve everything they dream of, whatever adversaries they face.”

Second place in the world-famous bottom competition went to 20-year-old Flávia Tamaio, an estate agent representing Brazil’s Distrito Federal.

And the first transsexual ever to compete, Paula Oliveira, 27, came third, despite other contestants claiming she should never have been allowed to enter the competition, after she underwent sex change surgery six years ago.

Miss Bumbum has gained worldwide notoriety since the competition began in 2011, with winners catapulted to overnight fame in Brazil.

Each year thousands of women are whittled down to 27, each representing a Brazilian state, before a public vote sends 16 through to the live final.

But founder Cacau Oliver announced that last night’s event would be the last of its kind, as the franchise concentrates on launching Miss Bumbum competitions in other countries such as Russia and Japan.

The first Miss Bumbum World is also due to take place in Moscow next May, where the planet’s sexiest bottom will be crowned.

The winner's sash was returned to its rightful owner after the clash Photo: SplashNews.com

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