Mixed Vocal Jazz Sextet from Moscow, Russia.

A Cappella ExpreSSS is a professional a cappella group from Russia, consisting of six members: soprano Elena Nazarova, tenor Max Kostra, soprano Katya Nadareishvily, baritone Anton Kasatkin, Etery Beriashvily and bass Andrey Tunik.

The ensemble was founded in March 2002. On August 17, 2002 they performed for the first time in the Moscow art-club Nostalgie. In the next year, the group recorded their first album, Magic Moments. In 2006 they signed a contract with Universal Music.

A large portion of the songs they perform are well-known international and Russian hits, Russian folksongs, and their own interpretation of classical music. However, they also compose and sing their own songs.