Joshua Ray Walker revealed that the cancer has spread to his lungs, and he’ll likely be restaged to Stage 4 in the coming days. The singer and songwriter has set up a GoFundMe to cover living costs and out-of-pocket health expenses as he fights his way back to good health. Joshua Ray Walker’s most recent album is Thanks for Listening, released in February.After revealing his colon cancer diagnosis in December, he underwent surgery on Jan. 3.He’s been candid about treatment, including an update from earlier this summer that shared he was set to wrap chemotherapy in two weeks.Related: Top 20 Cou…