What song did Billy Joel write about Christie brinkley?

Billy Joel wrote the song "Uptown Girl" about Christie Brinkley, who was his girlfriend at the time. The song, released in 1983 on his album "An Innocent Man," reflects the charm and allure of a high-class woman, drawing inspiration from Brinkley's glamorous image. Its catchy melody and upbeat rhythm contributed to its popularity, making it one of Joel's signature hits.