Beyoncé
"It's time for change, let's chime for change," the charity event's headliner said from the stage at Twickenham rugby stadium in London. B did "Crazy in Love" with hubby Jay-Z and performed several other hits.
Ryan Reynolds & Zoe Saldana
Was The Green Lantern star's blue attire inspired by Saldana's Avatar?
Madonna
Onstage at the London concert, Madge announced that her Ray of Light Foundation would be supporting girls education in Pakistan and Afghanistan.
Rita Ora
The singer puts her best red foot forward.
Blake Lively
The ever-fashionable star pumps up the crowd at the Gucci-supported concert benefiting women and girls' charities.
Jennifer Lopez
J.Lo rocked the stage with Mary J. Blige, dueting on a cover of The Beatles "Come Together" that had the boisterous crowd singing along.
Timbaland
The music impresario wows the crowd during his performance with Duran Duran's Simon Le Bon.
Salma Hayek
Always a passionate advocate for women's rights, the actress is in her element inspiring the crowd at Chime for Change.
Florence Welch
Bringing the drama (When does she not?), flow and her band rock the stage.
James Franco & Jessica Chastain
Stars of the upcoming flick Tar share a laugh with the huge crowd at Twickenham Stadium for the women's empowerment event Chime for Change: The Sound of Change Live.
Jessie J
The Brit-pop singer brings out her upbeat protest number for the sing-along crowd in London, urging fans to do the right thing and forget about the "Price Tag." Sweet!
John Legend
The always dapper star brings his soulful stylings to the London stadium stage to benefit charities for women and girls.