The Quarteto em Cy, the most important female vocal group of the MPB, was formed by the sisters Cyva, Cynara, Cybele, and Cylene. Coming to know Vinícius de Moraes and Carlos Lira in the early '60s, they had their vocal group named by the two composers. They also did shows around Brazil and South America with Vinícius de Moraes, Dorival Caymmi, Baden Powell, and Oscar Castro-Neves. In the historic festivals, they performed the "Samba do Crioulo Doido" (Sérgio Porto), "Apelo" (Baden Powell/Vinícius de Moraes), and "Pedro Pedreiro" (Chico Buarque de Hollanda). Some of their most...