Mercedes Sosa (born 9 July 1935Mercedes Sosa @ BrainyHistory.com) is an Argentine singer immensely popular throughout Latin America. With her roots in Argentine folk music, she became one of the preeminent exponents of nueva canción. Sosa is greatly admired for the depth and beauty of her contralto voice. She is nicknamed "La Negra" by her fans for her long, jet-black hair. She is best known as the voice of the "voiceless ones".[http://www.tmcnet.com/usubmit/2007/12/08/3150199.htm Singer Mercedes Sosa: The voice of the 'voiceless ones' outlasts South American dictatorships]

Sosa was born in San Miguel de Tucumán, in the northwestern province of Argentina, of mestizo descent from French and Amerindian (Quechuan) ancestry. In 1950, at age fifteen, she won a singing competition organized by a local radio station and was given a contract to perform for two months.

Sosa and her first husband, Manuel Oscar Matus, with whom she has one son, were key players in the mid-60s nueva canción movement (which was called nuevo cancionero in Argentina). Her first record was Canciones con Fundamento, a collection of Argentine folk songs.

In 1967, Sosa toured with great success the United States and Europe. In subsequent years, she performed and recorded extensively, broadening her repertoire to include material from throughout Latin America.

In the early 1970s, Sosa released two concept albums in collaboration with composer Ariel Ramírez and lyricist Félix Luna: Cantata Sudamericana and Mujeres Argentinas (Argentine Women). She also recorded a tribute to Chilean poet Violeta Parra.

A supporter of Perón in her youth, she has favored leftist causes throughout her life.

After the military junta of Jorge Videla came to power in 1976, the atmosphere in Argentina grew increasingly oppressive. At a concert in La Plata in 1979, Sosa was searched and arrested on stage, along with the attending crowd. Banned in her own country, she moved to Paris and then to Madrid. Her second husband died in 1978.

Sosa returned to Argentina in 1982, several months before the military regime collapsed as a result of the Falklands War, and gave a series of concerts at the Opera theater in Buenos Aires, where she invited many of her younger colleagues to share the stage. A double album of recordings from these performances became an instant best seller.

In the following years, Sosa continued to tour both in Argentina and abroad, performing in such venues as the Lincoln Center, Carnegie Hall and the Mog...