Billie Eilish became pop's fastest-rising star while recording in a bedroom studio built by her brother Finneas O'Connell inside their parents' Los Angeles house. This entry in Vox's Earworm series pulls apart that home-recording setup track by track, using isolated vocal stems, production software screen captures, and interview clips with Finneas to show how songs like 'Bury a Friend' get built from whispered vocals, ASMR-style sound effects, and deliberately off-key production choices that break pop conventions. Music journalist and host Estelle Caswell walks through the arrangement choices that make Eilish's sound distinct from typical chart pop, including her preference for quiet, close-mic'd vocals over belted hooks. The film treats the family setup itself as part of the story: a teenager and her brother working outside the traditional label-studio system, making decisions about tone and texture that a bigger production budget might have overridden. It's a tight, specific look at how a particular sound gets made rather than a general biography.