Neil Diamond will no longer be touring due to his recent diagnosis of Parkinson’s disease. The singer, who turns 77 on Jan. 24, announced his illness on his website Monday. “It is with great reluctance and disappointment that I announce my retirement from concert touring. I have been so honored to bring my shows to the public for the past 50 years,” Diamond said.”My sincerest apologies to everyone who purchased tickets and were planning to come to the upcoming shows.” The statement also explained that the onset of the Parkinson’s disease has “made it difficult to travel and perform on a large scale basis but will allow Mr.