Billie Eilish | Bury a Friend (2019)

"Bury a Friend" was released as the third single from the record on January 30, and later serviced to US alternative radio stations on February 19, 2019, with both releases occurring through Darkroom and Interscope Records. Eilish and her brother Finneas O'Connell co-wrote the song, with the latter solely producing it.

The song was described as synth-pop, electronica, electropop and industrial in press reviews, for which hip hop beats, percussion, and a synthesizer provide minimalist instrumentation. Within the dark and violent lyrics, Eilish sings from the perspective of a monster under someone's bed. Her vocals are subtle and treated with layers of vocal effects.

"Bury a Friend" received generally positive reviews from music critics, several of whom praised its dark nature and lyrics. The song was also likened to the music of Marilyn Manson, Lorde and Kanye West. It attained commercial success, including reaching number one in Sweden and Latvia. The song further peaked within the top ten in New Zealand, Canada, Australia, and the United Kingdom. The Recording Industry Association of America (RIAA) awarded it a triple platinum certification.

Michael Chaves directed the music video for "Bury a Friend", which was uploaded to Eilish's YouTube channel at the same time as the song's first release. The video depicts Eilish singing under the bed of British rapper Mehki Raine (known as Crooks at the time), who provides uncredited vocals on the song, being pulled by black gloves, and walking through a rundown apartment. Critics noted the video's horror elements.

Eilish promoted the song by performing it live at venues in 2019, including Coachella Valley Music and Arts Festival, Glastonbury Festival and during her When We All Fall Asleep Tour.

It was also included on the setlist of her 2020 Where Do We Go? World Tour.