Disturbed is well-known hard rock band with lead singer David Draiman. Classified as a heavy metal, or hard rock band, Disturbed is also regarded by some critics as nu metal, alternative metal. They have sold over 13 million albums worldwide. Disturbed headlined the first annual Rockstar Energy Drink Uproar tour with Avenged Sevenfold. In 2011 Disturbed headlined the Mayhem Festival, along with Godsmack and Megadeth. Top songs: Asylum, Another Way To Die, Down With the Sickness and Warrior.