Sá & Guarabyra, formerly Sá, Rodrix & Guarabyra, is a Brazilian folk rock duo hailing from Rio de Janeiro. They are famous for mixing rock music with traditional Brazilian caipira music, in a style they would call "rural rock".
From Wikipedia (https://en.wikipedia.org/wiki/Sá_&_Guarabyra) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)