Billy Joel's daughter Alexa Ray Joel reacted to his normal pressure hydrocephalus (NPH) diagnosis in an Instagram post shared on May 24, a day after the musician revealed he is dealing with the condition.

But sadly the “Vienna” singer has had to cancel his most recent tour after a health diagnosis that could put “The Piano Man” legend at risk. In a statement posted on Joel’s social media accounts, it was announced that Joel has Normal Pressure Hydrocephalus,