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Qamar-ol-Moluk Vaziri 1905 – 5 August 1959), born Qamar Khanum Seyed Hosayn Khan, commonly known as "Qamar", was a celebrated Iranian singer, who was also the first woman of her time to sing in public in Iran without wearing a veil. She is known as "the Queen of Persian music".Singing with the vocal range of a mezzo-soprano, she was revered for her mastery of the repertoire of Persian vocal music (radif-e âvâz), especially her sensitive rendition of tasnif and tarâna