Ever since 2Pac made his surprise appearance from beyond the grave at Coachella last month, we've been wondering how hologram technology might be used to bring other performers to "life" for concert audiences.

We already know Queen is planning its own Freddie Mercury hologram, but they're far from the only act that's looked into it -- as proven by Free bassist Andy Fraser's admission that the band considered doing the same thing for the 2012 Olympics.

Fraser, who quit the band in 1972, tells Classic Rock Magazine that the surviving members of Free (including vocalist Paul Rodgers and drummer Simon Kirke, who went on to form Bad Company) were approached to play at the opening ceremonies, and one option they considered was using a hologram to replicate guitarist Paul Kossoff, who died in 1976.

"I always figured we would re-marry our ex-wives before getting back together. But the event was such that I felt I should put aside my personal demons," explained Fraser. "We considered many guitarists. I suggested Mark Knopfler, Ron Wood, Dave Gilmour. I was looking into a Kossoff hologram by the Tupac people, so we would actually be playing with his track."

Ultimately, Fraser says, the talks didn't pan out. "The million-dollar price tag didn’t go down too well with others -- or suggestions about guitarists," he admitted. "I don’t see it coming together now."