Billy Joel’s ex-wife Christie Brinkley penned a heartwarming message to the Grammy-winning singer after it was revealed he is battling a rare brain disorder. “Dear Billy, The whole Brinkley gang is sending you lots of love and good wishes for a full and speedy recovery,” the model, 71, began in a post on Instagram Saturday.

Billy Joel has canceled all upcoming tour dates after being diagnosed with a rare brain disorder. The Grammy-winning singer announced on May 23 that he has normal pressure hydrocephalus, an uncommon condition characterized by fluid buildup inside or around the brain.

Howard Stern is sharing a health update on Billy Joel after a recent dinner following the singer's brain disorder diagnosis.