2017–2021: Debut and The Walls Are Way Too Thin Humberstone first caught attention whilst still in school after performing on
BBC Radio Lincolnshire in 2017. Through this Humberstone then performed at
Glastonbury Festival 2019 on the
BBC Music Introducing stage. Her debut single "Deep End" was then released on 30 January 2020. Her second single, "Falling Asleep at the Wheel", was released on 19 March, while her third single, "Overkill", was released on 26 June. On 30 July 2020, she released a cover of "
Fake Plastic Trees" by the English rock band
Radiohead. Her debut EP, also titled
Falling Asleep at the Wheel, was released on 14 August, which contained her three previous singles, alongside the tracks "Vanilla", "Drop Dead" and "Livewire". On 9 December 2020, she was included in
Vevo DSCVR's Artists to Watch 2021. She performed her song "Vanilla" on the channel. In March 2021, ahead of the release of her single "Haunted House" and her second EP, Humberstone signed with
Polydor Records in the United Kingdom and Darkroom/
Interscope Records in the United States. She also signed a publishing deal with
Universal Music Publishing Group. On 13 October 2021, Humberstone performed "
Scarlett" from her EP
The Walls Are Way Too Thin on
The Tonight Show Starring Jimmy Fallon. On 9 December 2021, it was announced that Humberstone had been awarded the
Brit Award for Rising Star, which recognises pop's most promising new acts to watch. Humberstone was the opening act for
Girl in Red's Make It Go Quiet Tour of North America in March 2022, as well as the opening act for the second half of the North American leg of
Olivia Rodrigo's
Sour Tour. Also in March 2022,
The Walls Are Way Too Thin won the Best Mixtape accolade at the
2022 NME Awards. After a string of standalone singles including "Sleep Tight", she released a compilation album of her music released at that point in time,
Can You Afford to Lose Me?. It was made available on 24 October 2022. In June 2023, she announced that her debut album would be titled
Paint My Bedroom Black. It was released on 13 October 2023 and was promoted with three singles: "Antichrist", "Room Service" and "Superbloodmoon", the lattermost of which featured American artist
d4vd. The latter track was later removed from streaming services following allegations of d4vd's involvement in the case of
Celeste Rivas Hernandez. In July 2023, she was featured on the song "Diving" by British band
Bombay Bicycle Club. In February 2024, Humberstone released
Dive and announced her third EP
Work In Progress would be released on 15 March, noting that the track listing was composed of demos she had forgotten about, as opposed to a typical deluxe album. On 5 August 2024, she was announced as an opener for the 16 August 2024 show of
Taylor Swift's
The Eras Tour.
2025–present: Cruel World In mid-2025, Humberstone returned to musical releases with a contribution to the soundtrack for
The Buccaneers, the song "Miss You to Death". Months later, she confirmed that a "new world" was beginning, hinting towards the start of a new album cycle. She thanked fans on social media for "waiting for [her] to get it right". Humberstone then released the single "
Die Happy" on 5 November 2025. Her second studio album,
Cruel World, was announced on 23 January 2026, accompanying the release of its second single, "
To Love Somebody", which Humberstone performed during a 28 January appearance on
The Tonight Show in the U.S. The album was released on 10 April 2026. == Musical style and influences ==