Quarteto Em Cy is a Brazilian all-female group founded in 1959 in Ibirataya. The group initially consisted of four sisters: Sibel, Silene, Sinara, and Siwa. The group quickly gained popularity thanks to their appearances on local television. Quarteto Em Cy is known for their masterful performance, precise intonation, and collaborations with leading Brazilian musicians of the 1960s and 1970s. Their repertoire includes jazz and Latin music, and their work has had a significant influence on musical culture in Brazil and beyond.

• Genres: Латиноамериканская музыка, Джаз
• Country: Brazil
• Language: Portuguese, Spanish, Italian