Beautiful 20-year-old Mariana Bridi da Costa passed away, CNN reports.

-  Unfortunately Mari couldn't resist any longer. She passed away at 3 a.m. today - said Henrique Fontes, director of Miss World Brazil.

The model`s death was also confirmed by Renato Lindgren, a friend of Mariana`s who took care of her blog. He wrote that he was on his way to the hospital with a friend.

- On behalf of all the family, we are grateful for the support and the affection that the entire world has sent to us – Lindgren wrote.

Mariana, who was supposed to have represented Brazil at the Miss World beauty pageant was diagnosed with a urinary infection and the doctors had to amputate both of her hands and feet in order to save her vital organs. A difficult infection caused septicaemia, which clogged her veins and cut of f circulation.

Mariana was admitted at the Intensive Care Unit of the Brazilian Doria Silva hospital. After she had her hands and feet amputated on Tuesday, Mariana has to have additional surgery on Wednesday, urgently.

Mariana`s boyfriend Thiago Simoes said that she fell ill in December, but was misdiagnosed with kidney stones. It is only after additional tests that it was determined she was infected with the Pseudomonas aeruginosa bacteria.

Take a look at the beautiful Miss Brazil in the photo gallery: Miss Brazil 2007, Mariana Bridi da Costa.

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