Stoyan Yankoulov  Stoyan Yankoulov (, born 10 September 1966), also known as Stundzhi (Bulgarian: Стунджи), is one of Bulgaria's most popular and renowned drummers and percussionists. Yankoulov formed the duo Elitsa & Stoyan to represent Bulgaria in the Eurovision Song Contest 2007 in Helsinki, and once again they represented Bulgaria in the Eurovision Song Contest 2013 in Malmö. Yankulov graduated from the Lyubomir Pipkov music school in Sofia and then from the Pancho Vladigerov National Academy of Music, majoring in percussion instruments. He has played with rock and jazz bands, folklore ensembles, and jazz-rock and fusion bands. He has also taken part in many folklore and jazz festivals across Europe and in the United States. Yankoulov showed interest in percussion instruments at a very young age. At the age of 10 he was the youngest drummer in his town's brass band (Elin Pelin). Meanwhile, Stoyan formed an amateur pop-rock band called Astronax (Bulgarian: Астронакс) in which he played drums. Their repertoire included songs by Supermax, Kiss, Deep Purple, Uriah Heep, Shturtzite, FSB, etc., but no original songs. His time with the band helped develop his sense of rhythm and gave him the confidence to be the spine of his group performances. Already engulfed in the world of percussion, Stoyan also continued piano lessons, which he had begun at age 8. His first professional appearance was in the jazz-rock fusion band Tact (Bulgarian:Такт) with Yavor Dimitrov (piano) Miroslav Janev (bass guitar) and Evgeniy Simeonov (guitar). After the group broke up, he played in several professional bands during his secondary education. When he had barely started his higher education, Yankoulov joined the Big Band of Bulgarian National Radio, in which he played for seven years. Playing in many jazz formations, he quickly got into the swing of jazz music and became a regular performer in major jazz festivals in Varna, Apollonia, Plovdiv, Rousse and others. Yankoulov spent the longest time of his career in the band Zone C, founded in 1994 with Vesselin Vesselinov-Echo (bass) and Vasil Parmakov (piano).