22 Celebrities Who Believe in Ghosts
Kim Kardashian May Have Had an Encounter With a Ghost: "I Am Freaking Out"
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In a 2011 interview on Home Grown Radio, Lamar said he'd been visited by the ghost of Tupac Shakur in his sleep, and the shadowy version of the late legend told him, "Keep doing what you doing, don't let my music die." The experience later inspired the "To Pimp a Butterfly" track "Mortal Man."