A hologram wish-list for dead musicians. At the Coachella Music Festival in April of 2012, a holographic image of the deceased rapper Tupac Shakur "performed" live on stage with headliners Snoop Dogg and Dr. Dre. The hologram greeted Coachella fans specifically, then went into a bit of Tupac's hit "Hail Mary" before joining Snoop for "2 of Amerikaz Most Wanted." Details of exactly how the effect was achieved were not released immediately after the event - for example, it's still unknown how the hologram was able to appear "in sync" with Snoop Dogg's live performance, nor is it clear whether the vocals being heard were entirely Tupac's. What is clear is that the performance had a huge emotional impact on the fans in the audience and those watching the show streaming on YouTube.So now that it's clear we have the technology to bring dead musicians back... who would you most want to see perform "live" from beyond the grave? Vote for the musicians or bands that you'd like to see revived in holographic form, and if I've forgotten your favorite long lost rock star, enter their name at the bottom of the page and add them to the list!