Londoners got a major treat when singers like Beyoncé, Jennifer Lopez, Rita Ora, Mary J. Blige, and Ellie Goulding belted out their famous tunes for a good cause at The Sound of Change Live concert presented by Gucci as part of its Chime For Change campaign. The evening raised $4.3 million in ticket sales and will fund about 200 projects in 70 countries around the world — all in support of girls' and women's empowerment. Beyoncé, who performed a special 45-minute set as the show's headliner, looked flawless in a black sheer and leather Gucci ensemble. Other stars that didn't need to sing to look stunning were Zoe Saldana, Freida Pinto, Blake Lively, and Jada Pinkett Smith. Head inside for the full scoop on what everyone wore to this spectacular London affair, and enjoy seeing some of it tonight on a NBC special airing at 9 PM ET.