Christie Brinkley is wishing her ex-husband Billy Joel a happy 76th birthday.

Billy Joel is one proud pop! Joel, who shares his eldest daughter, Alexa Ray Joel, with ex Christie Brinkley and two younger daughters, Della Rose and Remy Anne with current wife Alexis Roderick, ...

Christie Brinkley revealed how painful her marriage to Billy Joel really was: it was rife with affairs, drinking, and mess galore.