Solo Artist
Most frequent collaborator: Finneas O'Connell · 40 tracks
Holds writing credit on 38 of 40 tracks
Yes, almost entirely. Billie Eilish co-writes and co-produces nearly every song with her older brother Finneas O'Connell, from 'bad guy' to 'Birds of a Feather.' The two are credited together on the large majority of her catalogue, which gives her one of the highest authorship rates of any current pop star. A few tracks, like 'when the party's over,' were written by Finneas alone.
Across all 40 tracks: how many Billie Eilish wrote alone, how many they co-wrote, and how many were written by others. The bracket marks every track they hold any writing credit on.
Share of all 40 tracks where they are personally credited, by role.
Billie Eilish's writing credit per album, in release order. Hover any bar for the album.
Where Billie Eilish sits on the scale from a pure performer (0%, sings songs written by others) to a complete author (100%, writes everything). The bright marker is their catalogue authorship score, plotted against other artists on the site.
Reference artists spread across the scale, closest by genre and era.
None of the signature songs above fall in this category.
Darkroom / Interscope Records
Darkroom / Interscope Records
Darkroom / Interscope Records
No albums from this decade.
Bubble size = tracks worked on together. FO Finneas O'Connell
Data Insight
Billie Eilish co-writes and co-produces every song with her brother Finneas O'Connell, an unusually tight creative partnership for a mainstream pop act. Both receive lyricist and composer credit across her entire catalog. Her 100% authorship score places her among the most self-authored pop artists of her generation.
Quick Facts
Creative Fingerprint
One of the most self-authored pop artists of her era: Billie Eilish co-writes and co-produces every song with her brother Finneas O'Connell, so her authorship runs near 100%, almost always as a duo.
The Story
Billie Eilish is an American singer-songwriter who rose to global prominence as a teenager, known for her breathy vocals, genre-blurring sound, and unflinching exploration of dark emotional themes. Working almost exclusively with her brother Finneas O'Connell, she helped redefine mainstream pop through intimate bedroom-produced recordings that feel simultaneously confessional and cinematic. Her ability to convey vulnerability with precision, across whispered ballads and distorted electropop alike, has made her one of the most distinctive voices of her generation.