According to the Internet source given below, Mahalia Jackson was an American gospel singer. She was referred to as "The Queen of Gospel" and became one of the most influential gospel singers in the world. A civil rights activist and said to be "the single most powerful black woman in the United States". She recorded about 30 albums (mostly for Columbia Records) during her career, and her 45 rpm records included a dozen "golds" million-sellers. She refused to sing secular and said, "I sing God's music because it makes me feel free".
||Biography by wikipedia.org.