LONDON, ENGLAND - JUNE 01:  Singer John Legend performs on stage at the "Chime For Change: The Sound Of Change Live" Concert at Twickenham Stadium on June 1, 2013 in London, England. Chime For Change is a global campaign for girls' and women's empowerment founded by Gucci with a founding committee comprised of Gucci Creative Director Frida Giannini, Salma Hayek Pinault and Beyonce Knowles-Carter.  (Photo by Ian Gavan/Getty Images for Gucci)