Coldplay's early material was often compared to acts such as Jeff Buckley and Radiohead, while also drawing comparisons to U2^] and Travis. Since the release of Parachutes, Coldplay have also drawn influence from other sources, including Echo and the Bunnymen and George Harrison on A Rush of Blood to the Head (2002) and Johnny Cash and Kraftwerk for X&Y (2005).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, and the Teenage Cancer Trust.  See Coldplay LIVE! Purchase your Coldplay tickets today!