Billy Joel Serenades Ex-Wife Christie Brinkley with 'Uptown Girl' During Madison Square Garden Show

Christie Brinkley is supporting Billy Joel at his latest show! On Friday night (April 26), the 70-year-old model attended her ex-husband’s concert at Madison Square Garden in New York City. During the concert, a fan captured a video Christie dancing and smiling as the 74-year-old entertainer performed his iconic hit “Uptown Girl.” Keep reading to