Chamber choir «Overture» (Moscow, Russia), artistic director – Olga Ostrovskaya
Chamber choir «Overture» (Moscow, Russia), artistic director – Olga Ostrovskaya
Chamber choir «Overture» (Moscow, Russia), artistic director – Olga Ostrovskaya
Chamber choir «Overture» (Moscow, Russia), artistic director – Olga Ostrovskaya
Chamber choir «Overture» (Moscow, Russia), artistic director – Olga Ostrovskaya