2012–2015: Beginnings Diamond met
GFOTY through a friend, and GFOTY introduced her to
A. G. Cook. After a vocalist failed to show up to a session with Cook, the two worked on their first musical collaboration. In 2012, they recorded Diamond's first solo song, titled "Attachment". Diamond released her debut single "
Pink and Blue" through PC Music in October 2013. The song resembles a lullaby, with a harshly synthetic quality. The attention received by "Pink and Blue" helped to introduce the fledgling label, and it placed 5th on
Facts list of "The 100 best tracks of the decade so far". The following January, Diamond appeared on A. G. Cook's "
Keri Baby". The song toyed with the idea of Diamond as an
MP3 file or a digital entity on a screen. Diamond made her first live performance in April, at Basement in London. She released "
Attachment" as her second single later that month. "Attachment" is a melancholy ballad about modern relationships, with a high-pitched melody backed by farcical harmonies. Diamond's third solo single "
Every Night" was released in November 2014 and became PC Music's first single available through the
iTunes Store. The song discusses feelings of desire and showcases a more bold personality than Diamond's earlier songs. Her vocals are childlike and staccato, supported by "oh-ooh-oh" harmonies. The production drew comparisons to
La Bouche and "
Call Me Maybe" by
Carly Rae Jepsen. "Every Night" received nearly 200,000 plays on
SoundCloud within two weeks, and it became Diamond's first song to appear on a
Billboard chart, reaching 28th on the
Emerging Artists chart. and according to
Flavorwire was the one "who impressed the most." On 8 May 2015, Diamond performed as part of a PC Music show at
BRIC House in Brooklyn, New York as part of the
Red Bull Music Academy Festival. The show was billed as the premiere of Pop Cube, "a multimedia reality network". In November 2015, Diamond released her song "Hi" with a music video made in conjunction with
i-D magazine. With the resources to produce her first music video, she chose 'Hi' as a way to wrap up her earlier material and serve as a good introduction to her next phase. Diamond had begun recording a full-length album, originally planned for release in 2015.
2016–2021: Reflections February 2016 saw Hannah Diamond collaborate with
Charli XCX on a new track titled "Paradise", which featured on XCX's
Vroom Vroom EP, the first release on XCX's label Vroom Vroom Recordings. According to the singer, the label will combine her "love for bubblegum pop with mystery and darkness." In October that year, Diamond released the new single "Fade Away" with a lyric video via PC Music. On 22 December 2016, Diamond released a free single, "Make Believe", which was produced by easyFun and A.G. Cook. On 13 December 2017, she released a new mix, ''Soon I won't see you at all,
which contains three new tracks, one of which is a cover of "Concrete Angel" by Gareth Emery. It was made available on YouTube for streaming with a link to a ZIP file of the mix in the description. On 16 November 2018, Diamond released "True", which is the lead single from her debut album Reflections''. On 17 September 2019, Diamond released the song "Part of Me" with
Danny L Harle. Just over a month later, on 30 October, Diamond released the single "Invisible" with its accompanying music video. With this release, she also announced the release date for
Reflections and revealed the album artwork. On 13 November, Diamond released another single leading up to the release of her album, titled "Love Goes On"
. The song was released with an accompanying music video. On 31 October, she announced her first headlining tour "The Invisible Tour", which was set to begin on 4 December, but she added new dates on 1, 4, and 28 November. Her debut album
Reflections was released on November 22, and the tracklist was revealed the day before. On 5 February 2020, she announced that she would be the opening act in 4 shows for
Carly Rae Jepsen's
Dedicated Tour. The
Reflections remix album was released in April 2020, and the vinyl was released in early 2020. In 2020, Diamond featured on the remix for
100 gecs' "xXXi_wud_nvrstøp_ÜXXx" alongside Estonian rapper
Tommy Cash, and appeared on A. G. Cook's two 2020 albums
7G and
Apple. In 2021, Diamond appeared on the Danny L Harle single, "Boing Beat", from his debut album
Harlecore, and featured on the remix for A. G. Cook's "The Darkness", alongside
Sarah Bonito of
Kero Kero Bonito. She appeared on labelmate
Namasenda's debut
Unlimited Ammo mixtape in October 2021, and designed much of the project's single and album artwork.
2022–present: Perfect Picture Diamond begun teasing a second album in mid-2021 via social media. After debuting a new song at PC Music's
Pitchfork Music Festival London showcase and previewing it on TikTok, Diamond released the single "Staring at the Ceiling" on 24 February 2022. A year later, she released "Affirmations" as the second single from the album. "Perfect Picture" was released as the third single on 17 August. The same day, her
second album with the same name was announced for release on 6 October. in October 2023 The fourth single, "Poster Girl", was released on 14 September 2023. The announcement was met with accusations that Diamond copied Swedish singer
Zara Larsson's cover art for the
album of the same name. Diamond addressed this, stating that "there is no joy to be found in using someone else's experience", and affirmed the legacy and influence her own photography and art from PC Music have had on culture.
Perfect Picture marked a departure from the hopeless sound presented on
Reflections, with
Pitchfork author Peyton Toups writing "As Diamond steers away from the icy, sad-girl trappings of her earlier work, she morphs into a more upbeat, motivational pop star". ==Visual artistry==