Add Yahoo as a preferred source to see more of our stories on Google. In an extra special Kellyoke, Kelly Clarkson and My Band Y'all perform their first cover of Metallica on the show, "Sad But True." ...

Kelly Clarkson is a heavy-metal goddess. Clarkson, whose ability to sing a wide range of genres (classics, rock anthems and even theme songs, among them) dates all the way back to her "American Idol" ...