Indestructible is the fourth studio album by American heavy metal band Disturbed. A self-produced effort, Indestructible is the first Disturbed album that did not feature Johnny K, the producer of Disturbed's previous three albums, The Sickness, Believe, and Ten Thousand Fists. Indestructible was recorded at Groovemaster Studios in Chicago, Illinois. The album features two songs, "Perfect Insanity" and "Divide", that were written by Disturbed prior to their first album, The Sickness, but were never previously released. Indestructible is also the third consecutive Disturbed album to debut on the Billboard 200. The album features significantly darker themes than any of Disturbed's previous work, according to the band. Some of the lyrical themes involve actual experiences that vocalist David Draiman had endured over the course of the past few years prior to making the album, including "bad relationships", a motorcycle accident that he was involved with, and an incident of suicide. To match the aggressive attitude and nature of said themes, Draiman told the other band members to create darker, more textural music than they have before. Despite these themes, the title track, "Indestruc…