Olivia Rodrigo surprised fans when she walked out on stage at a Billy Joel concert in New York City this week.
They performed her hit “Déjà vu” which mentions Billy Joel’s classic song, “Uptown Girl.” So, they sang that too.
From the Madison Square Garden stage, Rodrigo said: “Thank you so much for having me, Billy. I’m such a huge fan. And, uh, I kind of wrote this next song about you.”