From Tupac's surprise performance at Coachella in 2012 to Michael Jackson's appearance at the 2014 Billboard Music Awards, hologram technology has proven it has the wow factor.
Even beyond bringing stars back from the dead, many in the entertainment industry can see big potential for holograms.
But it's been slow to hit the big time, in large part due to a bitter legal fight between rival companies with competing claims to the technology.
It's a story that Eriq Gardner, senior editor at The Hollywood Reporter, has been digging into. He joined Take Two to break it all down.