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Gus Monsanto is the stage name of Gustavo Monsanto (born Petrópolis, Rio de Janeiro state, Brazil) is the former lead singer of the French progressive metal band Adagio, and former lead singer of Finnish band Revolution Renaissance formed by Timo Tolkki after he left Stratovarius. He is the brother of journalist Eduardo Monsanto of ESPN Brazil.
In 2009 he released an album as frontman of the band The Lightseekers.
Gus Monsanto is new singer of German metal band Human Fortress and he is singing on the new album which was released November 9. called "Raided Land".