Linda Ronstadt was one of the most well-known singers of the '70s and '80s. She had hit after hit while inspiring and helping other musicians find success. Her personal life was just as intriguing to the public as a high profile relationship with California's Governor hit the headlines. All that came to a screeching halt with the diagnosis of Parkinson's. Peers and fans alike show their support for the singer as she faces the greatest test of her life.