Although Hey sometimes described themselves as the first Polish grunge band, their melodic, guitar-driven rock and eclectic appearance owed more to New Wave and heavy metal influences; their first three albums contained songs in both Polish and English. During the band’s mid-1990s heyday, they sold out stadiums throughout Poland, and attempted to break into the English-language market with a series of concerts overseas and an English version of their 1995 album ?. When this failed to arouse interest, the band began to write in Polish only, and gradually adopted a harder-edged, more industrial-influenced sound. Overall, the band has sold over 2.2 million album copies, with a new album planned for next year which will surely make these numbers rise higher.