It's MTV's second annual Musical March Madness! MTV News took the 64 biggest names in rock, split them up into four regions, assigned them seeds and puts them up against one another in a single-elimination series of match-ups in a winner-take-all contest. We're leaving it to you to decide an actual champ in this field of 64, so over the next few weeks, fan voting will determine who will emerge as this year's champion. Vote for Disturbed now HERE. Spread the word on Twitter by using the #MMM hashtag. Voting for all of the first round match-ups will go until Sunday night (March 20), and we'll reveal the next round of match-ups next Monday (March 21).