Billie Eilish and Finneas are rocking the stage!
The 19-year-old entertainer and 24-year-old singer/songwriter/producer perform together during Night 2 of the 2021 iHeartRadio Music Festival at T-Mobile Arena on Saturday night (September 18) in Las Vegas, Nevada.
Other stars who attended the concert included country singers Sam Hunt, Ryan Seacrest, Saweetie, The Kid LAROI, Yungblud, Bachelorette couple Tayshia Adams and Zac Clark, 24kGoldn, and Lil Baby.