Watch the Cast of Broadway's The Lion King Perform 'One by One' in Tribute to Nelson Mandela on GMA

Nelson Mandela, the revered South African icon who spent 27 years in prison, led his country to democracy and became its first black president, died on December 5 at the age of 95. Mandela inspired a generation of activists, so it's befitting that the cast of Broadway's The Lion King, including native South African Ron Kunene, headed over to GMA on December 6 to pay tribute to the lost leader. "The legacy of Nelson Mandela is going to be a test because we have to perpetuate his vibrant vision of non-racial democratic society," says Kunene. Watch the cast's moving performance of "One by One" in the clip below.