The Spanish opera singer Teresa Berganza (born 16 March 1935) is the foremost soprano/mezzo-soprano of the third quarter of the 20th century. She is most closely associated with the roles of Rossini, Mozart, and Bizet. She is admired for her technical virtuosity, musical intelligence and beguiling stage presence. Wikipedia
The definitive Wikipedia entry for Teresa Berganza. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Teresa_Berganza