Sergio Bavini, known as Sérgio Reis (born June 23, 1940), is a Brazilian sertanejo singer, actor and politician. He has sold approximately 16 million copies of his more than 40 album releases. Reis was born in São Paulo, and began working in radio stations and nightclubs as a teenager. In 1958, he released his first record, "Enganadora" b/w "Será", but did not garner any notice. In 1967 he was invited to record with The Jet Blacks, and the resulting singles – "Coração de Papel," "Nuvem Branquinha," "Fim de Sonho," and "Qual a Razão," all shot to the top of the Brazilian charts. He became a fixture on Jovem Guarda radio and television, writing songs for Jerry Adriani, , , Deny e Dino, Marcos Roberto, and .