At 5 years Graziella went for her first singing lessions with Doreen Galea latey joint her choir The Doreen Galea Choir, at eleven she moved to taken singing lession with Priscilla Psaila today know as ‘Kaya’ Priscilla Giordano Psaila.
Graziella taken part in serveral festivals and one could mention J & A Caruana Festival, Stardust Promotions, Singer Stage Malta International Festival 2014, where is placed third, Konkors Melodija Maġika 2015 where she placed second, with the song Tistaqsuniex lyrics by Rita Pace and composed by Augusto Cardinali, Malta Summer Hit Song Contest 2015, where she placed second in televoting, Il Cantagiro in Rome , Italy, where she placed first coverversions and third from Senior Section, Konkors Melodija Maġika 2016 wher e she placed second, with the song Oġġett lyricst by Rita Pace and composed by ‘Kaya’ Priscilla Giordano Psaila, in May 2016 she get a great expereance in The May Note Festival 2016 at Poland when she win the Grand Prix from 131 singers.
From time to time Graziella made serveral guest appearance like Balzan Night, Naxxar Night, Oħloq Tbissima and The Celebrity Night show. She also was an extras in the popolar drama Gizelle. She got a wish to go aboard and sing in New York.
On 26 April, 2016 was announced the 40 songs in the Preliminary Eliminatoy Round of the L-Għanja tal-Poplu 2016 - Festival tal-Kanzunetta Maltija and Graziella got a song named Waħdi Miegħek (Alone With You) lyrics by Ingrid Vella and composed by ‘Kaya’ Priscilla Giordano Psaila.
On 8 May, 2016 the same song passed form the Second Phase of the Festival, and passed with the 18 Finalist.
In May 2016, Graziella took part in May Note Song and Dance International Festival 2016 held in the city of Czestachona in Polonja and win the Grand Prix from 131 singers tahken part in this Festival.
In July 2016 Graziella took part in the L-Għanja tal-Poplu 2006 – (Festival Kanzunetta Maltija) with the song Waħdi Miegħek lyricist by Ingrid Vella and composed by ‘Kaya’ Priscilla Giordano Psaila. She passed from the Semi-Final held on Thursday 7 July, 2016 but he didn’t made it,for the Final Night held on Saturday 9 July, 2016.
This quartet was formed by Justine Delmar, Bradley James, Maria Christina Desira and Graziella Vella and they will taken part in the Konkors Kanzunetta Indipendenza 2016 with the song named Aħwa Maltin,Aħwa Għawdxin lyricist by Dorian Psaila and composed by ‘Kaya’ Priscilla Giordano Psaila.
Incidentally this song was reached with the 20 finalist by Danica Muscat but she got another song named M'hawnx Isbaħ and get that song and give the song Aħwa Maltin, Aħwa Għawdxin to K4.
On September, 2020 Graziella reach the final of Konkors Kanzunetta Indipendenza 2020 with two songs 'Darba f'Mitt Qamar' lyris by Rita Pace and music by ‘Kaya’ Priscilla Giordano Psaila, and the other song 'It-Triq tan-Nofs' lyris by Kristen Mifsud Schembri and music by ‘Kaya’ Priscilla Giordano Psaila.
On 16th May, 2023 Graziella and her husband Kirsten Mifsud Schembri made it to the Final Night of the 47th. Edition of the L-Għanja tal-Poplu 2023 with the song X’Għarukaża lyricist by Etienne Micallef and composed by ‘Kaya’ Priscilla Giordano Psaila. The Final Night will be held on Saturday 5th. August, 2023. At the at the Pjazza Teatru Rjal in Valletta.