GRAMMY-winning rocker Robert Plant recently told "Rolling Stone" that he's moved on from the sound that the iconic group created in its heyday.  Plant recently explained why he didn't want to tour with Led Zeppelin after the band's 2007 reunion in London.   Plant said, "I've gone so far somewhere else that I almost can't relate to it...It's a bit of a pain in the pisser to be honest.  Who cares? I know people care, but think about it from my angle - soon, I'm going to need help crossing the street." That said, the 62-year-old said that rehearsals for the band's brief reunion were "really, really good," adding that their set was a good representation of Led Zeppelin.