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Ferri's career began in a Milan nightclub in 1963. By 1965, she had broken into the Rome singing scene by singing popular Roman songs. One of her biggest hits was "Sempre" ("Always"). During her career, she also performed Neapolitan and Latin American pieces. During the 1970s, she starred in several popular TV shows. By the 1990s, however, she had largely left the spotlight.
She died in Corchiano, province of Viterbo, after falling from a third-floor balcony in an apparent suicide. Family members dispute this, saying she may have fallen ill after taking anti-depression medication and lost her balance.