Billy Joel may not have written his 1983 hit “Uptown Girl” about his ex-wife Christie Brinkley, but she’s the woman most associated with the tune. The Tik Tok video shows the former model, now 70, grooving to the song with a huge smile on her face as Joel, 74, performs. In 2018, Elle Macpherson said she had actually been dating Joel when he was writing the song.