"Os Mutantes" is a Brazilian rock band formed in 1966, known for their innovative sound that blends elements of tropicália, psychedelic rock, and tropical music. The group was founded by Rita Lee, Arnaldo Baptista, and Sérgio Dias, and they became influential in the Brazilian music scene during the late 1960s and early 1970s. The band's music features experimental instrumentation and surreal lyrics, often reflecting the cultural and political climate of Brazil at the time. Their self-titled debut album, released in 1968, showcased their unique style and creativity, helping to establish them as pioneers in the Brazilian rock genre.