20 Weird and Wild Grammy Collaborations

Paul McCartney singing with Linkin Park and 19 more mash-ups from music's biggest night

Imagine Dragons and Kendrick Lamar, "Radioactive/m.A.A.d. City" (2014)

"I need y'all to recognize that Plan B is to win your hearts right here while we at the Grammys," Kendrick Lamar rapped during this mash-up of his brash good kid, m.A.A.d. city track with Imagine Dragons' stomping "Radioactive." While the lyric was a success-saluting variation on a verse he dropped at the end of 2013, the way he commanded the stage not only got Taylor Swift and Steven Tyler dancing, it turned the line into an instantly fulfilled prophecy. 

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