Born : July 4, 1983, Curitiba, Brazil.
Isabeli was a finalist in an Elite Model Look Contest in São Paulo in 1996.
At 16 years of age, she appeared in the "Victoria's Secret" catalog.
Isabeli has appeared for international magazines, Vogue, Marie Claire, Elle, Sports Illustrated swimsuit edition.
In 1996 she made it to the finals of the Elite Model Look Contest when she was just 13.
The following year she moved from Southern Brazil to Milan, Italy, to start her modelling career.
In 1999, at the age of 16, she appeared in the Victoria's Secret lingerie catalogue.
This created a huge controversy as Victoria's Secret had earlier stated that its policy was not to sign models younger than 21 years old.
However, the publicity generated by this proved beneficial to Fontana and she quickly rose to fame. Soon after the Victoria's Secret shoot, she was signed by Versace, Ralph Lauren and Valentino.
She has modelled for Sports Illustrated Swimsuit Issue, Marie Claire, ELLE and Vogue.