The group “Kvatro” is four graduates of the A.V. Sveshnikov Academy of Choral Art. Four voices, as four seasons. Anton Sergeyev's clear tenor is sunny summer, Leonid Ovrutsky's charming baritone is velvet autumn, Denis Vertunov's deep bass is epic winter, and Anton Boglevsky's graceful tenor is romantic spring. The history of this group has begun in 2003, since then the guys had time to win hearts of the European public by rendering of the compositions based on works of Russian composers, such as Rakhmaninov, Tchaykovsky, Borodin.

The group has taken national popularity in Sochi at the contest “Five stars. Intervision” in 2008 where the guys have taken the bun. And when boys made the cut of “Evrovision-2009” being among the top three of national selection, they gained general acceptance. Voices of participants are unique by the sounding nature, therefore their repertoire has the compositions of the most different styles - from classics in modern versions and love songs, to golden hits of the Soviet, foreign varieties and author's songs.

The group worked on one scene with Placido Domingo, Dmitry Hvorostovsky and Alessandro Safina. The joint performance with Joseph Kobzon took place in one of the most prestigious world halls Royal Albert Hall of Arts and Sciences in London. The soloists of the group were accepted by all largest Russian concert platforms in Russia.