A CD being unveiled today will showcase some of the world's biggest artists in aid of Amnesty International's Darfur campaign.
Instant Karma - The Amnesty International Campaign To Save Darfuris a double CD featuring some of the top names in music.
Live tracks will be performed in the Hard Rock Cafe in central Dublin, and video feeds from some of the artists involved will also be screened.
Musicians including U2, Avril Lavigne, REM, Aerosmith, Christina Aguilera, Green Day, The Cure, Snow Patrol, Youssou N'Dour have recorded versions of songs from the John Lennon back catalogue.
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Yoko Ono has donated all music publishing royalties to the cause.