Brad Arnold, the lead singer of the Grammy-nominated rock band 3 Doors Down, has died, months after he announced that he had been diagnosed with stage 4 kidney cancer. He was 47, The Guardian reported. 

The band said in a statement on Saturday that Arnold “passed away peacefully, surrounded by loved ones, in his sleep after his courageous battle with cancer”.

3 Doors Down formed in Mississippi in 1995 and four years later received a Grammy nomination for the breakout hit Kryptonite. Arnold wrote the song in math class when he was 15 years old, according to the band statement, according to The Guardian.