Billy Joel is "not ready to retire" amid his normal pressure hydrocephalus diagnosis, sources tell PEOPLE. The singer announced on Friday, May 23, that he would be canceling his upcoming concerts after previously postponing shows through June.

Earlier this year iconic model Christie Brinkley debuted her new memoir, Uptown Girl, where she discussed her own life while detailing failed marriages with Peter Cook and musician Billy Joel - among other things.

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),

And we’re always in the mood for your melodies and we all hope you’re feeling alright," Brinkley wrote to the musician, referencing the lyrics from one of his most famous songs Billy Joel can always count on Christie Brinkley to be in his corner.

Last week, the 76-year-old musician announced that he was diagnosed with the rare brain condition and had to cancel the remainder of his tour.

Christie Brinkley is showing her support for ex-husband Billy Joel following news of his recent health diagnosis. On Saturday (May 24), the 71-year-old model took to social media to share a heartfelt tribute to Joel, 76, just one day after he revealed he had been diagnosed with normal pressure hydrocephalus (NPH), a type of brain disorder.