[3] She has collaborated with many notable Italian singers, including Ornella Vanoni, Claudio Baglioni, Ron, Tiziano Ferro, J-Ax, Ermal Meta and Giuliano Sangiorgi.

In June 2008, Sony BMG Italy released the debut EP by Ferreri, which includes her first single "Non ti scordar mai di me" written by Italian pop singer Tiziano Ferro, and five covers of classic songs from the 1960s and 1970s.

The third single off the album was "La Scala (The Ladder)", originally written by Linda Perry and translated in Italian by singer Tiziano Ferro.

In her second studio album, Ferreri records cover versions of some of her favourite (Italian and international) artists: "La magia è la mia amante (I Was Made to Love Magic)" by Nick Drake, "Con una rosa" by Vinicio Capossela and Paolo Benvegnù, "Il mare verticale (Portrait the Sea)" by Jerome Kern, "Yesterdays" (song played in the past by Billie Holiday), "Ciao amore ciao" by Luigi Tenco and Estate by Bruno Martino.

"Piccoli Dettagli" was chosen as the "Song of the summer" after a survey made by Skytv After participating to Sanremo with the single "Ti porto a cena con me", Giusy released the album "L'attesa" which debuted and peaked at number 4 of the Italian Charts.

[13][14] It remained on top of the Italian chart for eleven consecutive weeks and later was certified "Diamond" in Italy for selling more than 500.000 copies in the country.

[17] The lead single "Volevo te" reached number 2 of the Italian Airplay charts and was certified platinum by FIMI.

[18] In 2017 Giusy came back to Sanremo Music Festival with the song "Fa talmente male" and released the album "Girotondo" which debuted and peaked at number 11.

[23] Giusy took part in the seventeenth edition of the talent show Amici di Maria De Filippi.

[26] In January 2019 Giusy released "Le cose che canto": the song was written by Dario Faini and Tommaso Paradiso.

[29] On 24 June 2020 a collaboration with the singer Elettra Lamborghini was announced and on 29 of the same month, the song "La Isla" was released.