Keith Richards, Robert Plant, Iggy Pop, Yoko Ono and Ringo Starr are among the artists who have joined the "We Are Not Afraid" campaign.

"We Are Not Afraid" is a global campaign aimed at raising funds for the refugee crisis and victims of religious and political violence.

It is centered around the song "We Are Not Afraid" by Nigerian singer Majek Fashek.

In total, 175 artists are involved in the campaign, including Questlove, Pussy Riot, George Clinton, Susan Sarandon, Thurston Moore, Fiona Apple, Fred Armisen, Phil Lesh, Ralph Steadman, The Doors' Robby Krieger and John Densmore, Shepard Fairey and more.

All proceeds generated by the project will be donated to Human Rights Watch (HRW) and the International Rescue Committee (IRC).