Brad Arnold, the lead singer of 3 Doors Down, has passed away. He was 47. The band's surviving members broke the news on Instagram on Saturday that the frontman died in his sleep following a battle with cancer. They wrote: "With heavy hearts, we share the news that Brad Arnold, founder, lead singer, and songwriter of 3 Doors Down, passed away on Saturday, February 7th, at the age of 47. With his beloved wife Jennifer and his family by his side, he passed away peacefully, surrounded by loved ones, in his sleep after his courageous battle with cancer.