Head-bangers unite! Rock out to Metallica, one of the biggest selling acts in American history, when they hit Edmonton this summer. Metallica has sold 100 million albums worldwide and has played to millions of fans the world over. They have scored almost a dozen multi-platinum albums, including 1991's Metallica (commonly referred to as "The Black Album"), which is the best selling album in the history of Soundscan, scanning almost 15.7 million albums in the United States alone, and over 25 million worldwide. Needless to say, scoop up your tickets before your out of luck!