Former U.S. President Bill Clinton, UK Prime Minister Gordon Brown, film stars Robert de Niro, Will Smith and Forest Whittaker and TV presenter Oprah Winfrey are among those attending celebrations that will climax with the three-hour concert on June 27.
Other guests at the concert included British Prime Minister Gordon Brown, former U.S. President Clinton, talk show host Oprah Winfrey and actor Robert De Niro.