With the latter, the St Monica Choir presented a production of Beethoven's 9th Symphony with Orkestra Nazzjonali under the baton of Dr Steve Watson at the Teatru Manoel in May 1999.

The St Monica Choir was also commissioned to premiere local compositions, such as Stabat Mater by prolific Maltese composer Carmelo Pace together with Orkestra Nazzjonali (the national orchestra) and Mro Michael Laus.

[2] In 2002, the choir was invited to make a guest appearance during a choral festival at the Dorog House of Culture in Hungary.

Two years later, the choir was once again invited to participate in the "XIII Festival de Musica en Navidad" organized by the Cultural Department of Madrid.

In 2004, to commemorate the 40th Anniversary of its foundation, the choir launched a comprehensive website and a documentary on DVD encompassing forty years of existence and achievements.

In 2006, the St Monica Choir performed a concert in Haddington, Scotland to raise funds for the local church.

She began piano lessons at the age of five, studied with Sr Teresina Saliba, and completed her finals and LRSM under the guidance of Ms Bascetta.

Upon returning to Malta, she continued teaching music and organized end-of-year concerts for her students that included dancing and choral singing.

On 13 December 2003, at the Grandmaster's Palace in Valletta, the President of the Republic, Guido de Marco, awarded Portelli the Midalja għall-Qadi tar-Repubblika for her efforts in promoting music and establishing the St Monica Choir.

[8] The repertoire included 'Magnus Dominus' by Benigno Zerafa and the test piece, 'Quam Dilecta Tabernacula Tua Domine' by Carlo Diacono (1876–1942).

The choir's performance also included 'Rhythm of Life' from Sweet Charity, 'The Bare Necessities' from the motion picture The Jungle Book and the spirituals 'Hush, somebody’s Calling My Name and I Want Jesus.'