Sunshine Vocal Studio
of „Paisii Hilendarski“ 
Community Centre, Balchik, Bulgaria 
Conductor: Valentina Georgieva, PhD

Chernomorski zvutsi Mixed choir
Balchik, Bulgaria
Conductor: Valentina Georgieva, PhD

Spectrum Acapella Group
Sofia, Bulgaria

Perunika female choir
Stockholm, Sweden
Conductor: Michael Deltchev

Detska kitka Children’s choir
Plovdiv, Bulgaria
Conductor: Yana Deliradeva

Ad libitum Cappella
Sofia, Bulgaria
Conductor: Maria Valchanova 

Trayana glas Vocal studio
Stara Zagora, Bulgaria
Conductor: Lilyana Doicheva

Folk Choir of the Goce Delchev
Ensemble, Sofia, Bulgaria
Conductor: Marek Dyakov

Styvar's children's choir 
Trinec, Czech Republic
Conductor: Alena Kostkova

Cantus chamber choir
St. Petersburg, Russia  
Conductor: Darya Goloushkina

Perpetuum mobile Children's choir
Kaunas, Lithuania
Conductor - Beata Kijauskienė

Ave musica choir
Odessa, Ukraine
Condutor: Sergii Savenko

Solo musica Children's choir
Odessa, Ukraine
Condutor: Levgeniia Bondar

The choir of the conservatory of
municipality of Kalamaria
Thessaloniki, Conductor: Irena Krajczyk

Female Choir of the Estonian Academy of Sciences, Tallinn, Estonia
Conductor: Andrus Siimon

Zhar-Sokol Female choir  
Moscow, Russia
Conductor: prof. Liubov Zharova

Mikra Mixed choir, Plagiari, Thermi, Greece
Conductor: Elefteria Metaxa

 
„Jiricky“ Children's choir
Mlada Boleslav, Czech Republic

 
Ioan Dimitrie Chirescu Mixed choir 
Cerna voda, Romania 
Conductor: Dincu Anghel

 
City mixed choir Gortinija
Gevgelija, Macedonia
Conductor: Ilija Atanasov

Rae Chamber Choir
Harjumaa, Estonia
Conductor: Alice Pehk