Jo Dee Messina has been diagnosed with cancer. The news was revealed on Wednesday morning (9/6) in a heartfelt letter posted on Messina's Facebook page. While no specific details were given about the type of cancer Jo Dee is facing, the note did say that she would begin treatment this fall. At this time, Messina's treatment plan is still unknown, but the message says that she is currently working closely with a team to explore all options. Messina's last tour date of the year will be on October 7 in Harrington, Delaware, with the remainder of her 2017 dates being postponed. The signer has also taken the semester off from classes at The King's University.