- ENSEMBLE VOCALE CANTICA NOVA, Milazzo (Italy)

- CHOIR OF THE PHILHARMONIC OF KORAKIANA SPIROS SAMARAS, Corfu (Greece)

- CORO FREEDOM, Catania (Italy)

- CORO SOUTHLAND, Dudley (Australia)

- CORO INCONTROVOCE, Palermo (Italy)

- CORO EVMOLPOS, Komotini (Greece)

- BEL CANTO CHOIR, Vilnius (Lithuania)

- YOUTH CHAMBER CHOIR ISTOK, Saint Petersburg (Russia)

- CORO DEL CORIANDOLO DI GINEVRA, Troinex (Canton Geneva - Switzerland)

- CHOIR APOLLO, Bratislava (Slovakia)

- AKADEMSKI PEVSKI ZBOR MARIBOR, Maribor (Slovenia)

- CORO MARIA SS. ANNUNZIATA, Oppido Mamertina (Italy)

- CORO ART MENU, Płock (Poland)

- GOETHE CHOR, Palermo (Italy)

- GIRLS CHOIR PUELLAE CANTANTES OF THE KAROL SZYMANOWSKI MUSIC SCHOOL, Wroclaw (Poland)