ZANZIBAR, Feb. 9 -- THE third night of Sauti za Busara in Zanzibar on Saturday carried two unforgettable surprises, one wrapped in wisdom, the other soaked in rain.

Between a legendary voice that defied time and a downpour that refused to dampen the spirit, the festival reminded everyone why music is both memory and momentum.

First came Charlotte Hill ONeal popularly known as Mama C, a 75-year-old force of nature from Arusha, who took over the Mivinje Stage and turned age into nothing more than a number.

For nearly an hour, she stood firm behind the microphone, her voice rising with authority, warmth and fire. Who could have imagined that at 75 she would command the stage with such grace and power?

Mama C did not perform; she possesse...