We're a few days late with this one, but Guitar Center, the world's largest musical instrument retailer, has kicked off its fifth annual King of the Blues competition in an effort to discover the next great blues guitarist. Guitarists can go to any one of 218 Guitar Center stores across the U.S. on Thursday, May 12th or May 19th, 2011 and strut their stuff, performing a live guitar solo backed by one of thirty original tracks developed by musician and producer Pete Anderson. One winner from each store will be chosen and move up to the district competitions, which will be held in 25 store locations.