Continuing with the African American History Month Theme, what two African American soprano/mezzo-soprano rivals graced the stage of Carnegie Hall in a tribute to Marian Anderson in 1982?<br />
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They brought the house down when the audience demanded an encore and they returned and swiched roles singing the same duet they had just performed. Soprano became mezzo-soprano and vice versa, singing the roles Norma and Adalgisa from Bellini&#39;s Norma.