Back to life: A collection of 'holographic' appearances

We've offered up the details about holographic live appearances, and now it's time to kick back and take in a few. Jump in the gallery below for performances from Michael Jackson, Tupac, Mariah Carey and more. There's also a feat from Sir Richard Branson allowing him to be in two places at once and a rather odd appearance from Al Gore.

Gallery | 13 Photos

Hologram performances