12-12-12: A calendar date -- and a concert -- of a lifetime

12-12-12 is here: It's an eye-popping quirk of the calendar that has brides running for the altar, some wondering whether the world is going to come to an end and setting the stage for what is arguably the single greatest concert lineup -- and the single largest concert -- the world has ever known.

By Rene Lynch

December 12, 2012