Grammys 2014

In another one of the most anticipated collaborations, hip-hop artist Kendrick Lamar teams with alternative-rock band Imagine Dragons to perform a mash-up of songs "Radioactive Teaser" / "M.A.D.D. City" /"Radioactive."

( Kevork Djansezian / Getty Images )

In another one of the most anticipated collaborations, hip-hop artist Kendrick Lamar teams with alternative-rock band Imagine Dragons to perform a mash-up of songs "Radioactive Teaser" / "M.A.D.D. City" /"Radioactive."

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