Vocalist Mandy Barnett will serve as a celebrity co-chair of the Nashville AIDS Walk on Oct. 9. Best known for portraying Patsy Cline in the musical, Always Patsy Cline, at the Ryman Auditorium, Barnett will also perform following the walk, as will Jars of Clay, the event’s other celebrity co-chair. “Like so many others, I have lost close friends to this dreaded disease,” Barnett said. “Even though technology is prolonging the lives of countless others, we should not be deceived into believing a cure is imminent. May we all treat our precious lives in such a way that those who have left us will not have died in vain.” CMT will serve as one of the event’s sponsors.