Катюша. Под гармонь (Katyusha, Russian folk song on button accordion)

http://www.youtube.com/v/MhBfIer_DgU?autohide=1&version=3&attribution_tag=5UxK__Nc5YbXW-sX5w_0iw&autoplay=1&showinfo=1&feature=share&autohide=1