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Since 1999 she has modeled for Sports Illustrated Swimsuit Issue, Marie Claire, ELLE, Vogue, Harper's Bazaar, Numéro, i-D, Arena and many others.In 2008, she made her debut on the Forbes The World's 15 Top-Earning Models list at place 11, having earned $3 million.She is also in the second place on the Top 50 Models Women list by "models.com".As a youth Isabeli attended the Church of Jesus Christ of Latter-day Saints in the Portão district of Curitiba. She was married to model Álvaro Jacomossi but they divorced in 2004. Their son, Zion, was born in 2003. Fontana married actor and model Henri Castelli on December 10, 2005 and their son, Lucas, was born on October 23, 2006 in São Paulo. Fontana and Castelli are separated now and are in the process of divorcing.
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