Readers' Poll: Which Singer Has the Most Unique Voice?

It takes a certain kind of singer to belt out lines such as "The hammer of the gods will drive our ships to new lands/ To fight the horde, singing and crying/ Valhalla, I am coming!" without sounding like a complete idiot. Robert Plant pulled it off effortlessly. His banshee wail was as important to Led Zeppelin as Jimmy Page's guitar playing, though in recent years he has sung in a manner more befitting a man of his age. But in December of 2007, for one glorious night in London, he became the Golden God again, singing classics like "Black Dog" and "Rock and Roll" in the proper way. And he proved that he still had it.