Billy Joel's daughter is speaking out in support of her father following his recent health diagnosis. Alexa Ray Joel - the daughter of the "Piano Man" and his ex-wife, model Christie Brinkley - took to social media on Sunday (May 25) to thank fans for their support and share an uplifting message after her father revealed he had been diagnosed with normal pressure hydrocephalus (NPH),

The 76-year-old singer was diagnosed with Normal Pressure Hydrocephalus (NPH), according to a statement on his website.

"This condition has been exacerbated by recent concert performances, leading to problems with hearing, vision, and balance," the statement said.