Igor "Yegor" Fyodorovich Letov was a Russian singer-songwriter, best known as the founder and leader of the post-punk/psychedelic rock band Grazhdanskaya Oborona, as well as the founder of the conceptual art avant-garde project Communism and psychedelic rock outfit Yegor and Opizdinevshie. Letov collaborated with singer-songwriter Yanka Dyagileva and other Siberian underground artists as a record engineer and producer.