Since the release of "Parachutes", Coldplay have drawn influence from other sources, including Echo & the Bunnymen, Kate Bush, George Harrison and Muse on "A Rush of Blood to the Head", Johnny Cash and Kraftwerk for "X&Y" and Blur, Arcade Fire and My Bloody Valentine on "Viva la Vida". Coldplay have been an active supporter of various social and political causes, such as Oxfam's Make Trade Fair campaign and Amnesty International. The group have also performed at various charity projects, such as Band Aid 20, Live 8, Sound Relief, , and the Teenage Cancer Trust.