Diagnosed with Alzheimer's, Tony Bennett continues recording with Lady Gaga

Doctors told the 94-year-old singer's family to keep him singing and performing for as long as he can enjoy it. Photo: AP

The family of Tony Bennett has revealed that the legendary singer has been suffering from Alzheimer's disease, breaking their silence on his condition four years after he was diagnosed.

His wife, Susan, told AARP Magazine in an interview published on Feb 1 that the 94-year-old singer, best known for the ballad I Left My Heart In San Francisco, had been losing his ability to make decisions.