Brad Arnold, the singer with US rock band 3 Doors Down, has revealed he has been diagnosed with stage four kidney cancer.
The 46-year-old said in an Instagram video that he has "clear cell renal carcinoma that had metastasised into my lung", adding: "And that's stage four, and that's not real good."
The band made it big in the early 2000s with hits like Kryptonite, Here Without You and It's Not My Time, and have sold more than 13 million albums in the US.
"Now, I believe It's Not My Time is really my song," Arnold wrote to fans in an accompanying caption. "This'll be a battle so we need our prayers warriors!"