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Christopher Polk/Getty Images for Coachella
The legendary rapper never lived long enough to see the first Coachella festival take place in 1999, but he metaphorically rose from the grave to "perform" alongside 2012 headliners Dr. Dre and Snoop Dogg. The eerily lifelike hologram, which took months to create and received the blessing of Tupac's mother, had all 80,000 attendees in awe when it proclaimed, "What the f--k is up Coachella?!" Footage from the late artist's final performance in 1996 was used to bring hits like "2 of Amerikaz Most Wanted" and "Hail Mary" to the main stage.