Vince Mira was apparently discovered on a street corner singing Johnny Cash songs. He is so similar that John Carter Cash was freaked out by him.
I stumbled on Vince while reading John Keatley's excellent blog on his portrait shoots and how he lights them. He is a master of adding light to create natural looking images that look incredible when shot at low ISO with medium format digital backs. Serious business with 10s of thousands in equipment. Well worth reading someone who can do that stuff ...
He shot Vince in Seattle for an article by James Ross Gardner called Vince Mira Won't Walk the Line. I believe the gist is that Vince will be giving up the Johnny Cash mimic business and working on his own music. He certainly sounds great and should be able to make a go of it. The blog entry for that is good reading. Here is an image from that blog entry, obviously copyright John Keatley ... and you can click through to his blog.
Here is a video of his visit with Ellen DeGeneres ... he sings Ring of Fire and you MUST hear this! He starts singing about 40% of the way in if you are impatient. And she gives him a Gibson Hummingbird right near the end if you go in for that sort of thing.