Elias Leight / Wall Street Journal: How Billie Eilish Rewrote the Business of Pop Music - At just 23, she has racked up nine Grammys and two Oscars. Now the hitmaker is making the industry more sustainable-for the world and herself. ... IN FEBRUARY 2023, Billie Eilish started work on a new song with Finneas, her brother and primary collaborator, at his home studio.