Giannis Poulopoulos (Greek: Γιάννης Πουλόπουλος, a.k.a. John Poulopoulos; 29 June 1941 – 23 August 2020) was a Greek singer-songwriter, who had several hits in Greece during the 1960s, 1970s, and 1980s. In terms of total album sales, he is the fourth biggest-selling Greek singer of all time.