This text makes an analisis about the cururu, a kind of singing challenge typical from countryside of state of São Paulo, Brazil. Making a transcription of these challenges, it tries to point for questions about cururu's structure and performance, seen like a struggle between two singers that fight using singing words. At the same time, it sees like the cururu is a local updating of a social fact: the exchange. For this, it is possible to think about its characteristics in relationship with other kinds of singing challenges and making points about these social facts.
cururu; singing challenges; reciprocity