EMPRESS OF SOUL, GLADYS KNIGHT "VACILON" (FEELIN' GOOD). The EMPRESS OF SOUL, GLADYS KNIGHT is part of a 140 American musical contingent that traveled to the island nation of CUBA for musical and cultural exchange. La EMPERATRIZ DE ALMA, Gladys Knight, sings with CUBAN Edesio Alejandro in "VACILON" (FEELIN' GOOD).