Billie Eilish on Which Barbie She Would Be (Exclusive)

Billie Eilish and Finneas chat with ET’s Will Marfuggi at the Los Angeles premiere of ‘Barbie.’ The artists, who wrote a song for the film, share what it was that drew them to be a part of the project. Plus, Billie reveals which kind of Barbie she’d want to be if she lived in Barbie Land. ‘Barbie’ is in theaters on July 21.