Bob Marley was one of the most brilliant performers of the 20th century, embodying all the joy, sadness and hope that his songs contained. These artists add their own twist. Johnny Cash and Joe Strummer make "Redemption Song" even rawer, their voices cracking over acoustic guitar. Corinne Bailey Rae, meanwhile, restyles "Is This Love?" as breezy neo-soul, drawing out Marley's melody over a loose piano groove.