She first earned recognition for surreal performance art videos on YouTube, in which she played an uncanny valley–like android commenting on and satirizing internet culture and modern society.

(2018), while her second EP, Choke (2019), and third album, I Disagree (2020), continued in a heavier direction and incorporated heavy metal and industrial rock.

Her following two albums, Flux (2021) and Zig (2023), as well as her fifth EP, Stagger (2022), featured alternative rock and dark pop sounds.

[14] She was featured on Eppic's song "Hide and Seek" in 2013,[15] and moved to Los Angeles to pursue her music career.

[17] The videos were described by Sinclair as "a combination of Andy Warhol's pop accessibility, David Lynch's creepiness, and Tim Burton's zany comedic tone".

[16] Sinclair also alluded in an interview that Poppy's character in the promotional videos presented itself to him as an android and how some of the concept relates to the uncanny valley hypothesis.

[5][21] The channel has been discussed by other YouTubers, including PewDiePie,[22] Social Repose,[23] Night Mind,[24] the Film Theorists,[25] Reaction Time, and the Fine Brothers on their React series.

[42] Its second single, "Computer Boy", was released in May and received the Song of the Year nomination at the Unicorn Awards.

[53][54][55] On May 7, Poppy made a public statement about the "frivolous" lawsuit, saying Argo was attempting to manipulate her psychologically.

[53][57] In July 2018, Poppy released a cover of Gary Numan's song "Metal" as a single on all digital platforms.

[60][65] At the end of the year, Poppy began to drop hints about a new project and website called Poppy.Church,[66] which is no longer active.

[76] It was co-written by Poppy, Sinclair, and Ryan Cady, with art by Masa Minoura and Ian McGinty.

[77] On January 23, 2019, Billboard announced Poppy would star in the augmented-reality experience A Jester's Tale, created and directed by Asad J. Malik.

[79] After attending the iHeartRadio Music Awards in 2016,[80] she returned in 2019 wearing a dress designed by Viktor & Rolf,[81][82] and sat front row at their fashion show.

After numerous delays due to the COVID-19 pandemic, it was published on October 20 alongside a soundtrack album, Music to Scream To.

[117][118] On December 29, 2020, Poppy announced that she had been working on the follow-up album to I Disagree and said it will have "a completely different sonic vibe" to its predecessor.

[124][125] Poppy and Sumerian Records teamed up with Roblox for its first-ever listening party upon the release of the album, streaming Flux on the gaming platform.

[128][129] She also announced the Never Find My Place Tour, which started on March 8 in Sacramento, California, and ended on November 30 in Glasgow.

[130][131] On August 27, 2022, Poppy premiered a song at the Reading Festival called "FYB", an acronym for "Fuck You Back".

In March 2023, Poppy announced the song "Church Outfit",[140] which was released in April as the album's lead single.

[164][165] On September 29, 2024, Poppy joined the Canadian metal band Spiritbox to perform their song "Soft Spine" at the Louder Than Life festival.

[169] In November 2024, Poppy's single with Knocked Loose, "Suffocate", was nominated at the 67th annual Grammy Awards in the Best Metal Performance category.

[199] She is a fan of Jimmy Eat World, No Doubt, Norma Jean, Blondie, Gary Numan, Of Montreal, and Madonna.

[56] V magazine listed Poppy as part of the new generation of music, saying that "her hatched-from-an-egg, Glinda the Good Witch vibes have inspired labels from 'human ASMR' to a one-woman 'digital rabbit hole', none of which seem to stick".

[16] In a review of I Disagree, Neil Z. Yeung of AllMusic called it "a metallic storm, informed by pulsing beats, thrashing riffs, and crushing breakdowns.

"[210] David Mogendorff, who works in artist content and services for YouTube and Google Play Music, said she has "a strong J- and K-pop influence".

Her channel is an index of every insincere apology, desperate bid for views and assurance that they couldn't do it without her fans you'll ever see.

That Poppy is not only skewering the absurdity of people who make a living as public figures on the internet—she has it out for the entire experience of being online."

Mogendorff said the videos are "like social commentary... touch[ing] on the anxieties of modern life" and "a really interesting way of communicating, personal but strange".

She also claimed that the same ex-boyfriend was leaking her unreleased videos, photographs of her without make-up, and "very personal demos that only he has" such as a cover of the Pokémon theme song.