2012–2014: Maybe Rave Jen Newton (vocals), PJ Shepherd (guitar, vocals), Harry Carter (bass), and George Powell (drums) formed Maybe Rave in 2013 in
Auckland, New Zealand. They initially uploaded
covers of songs by other artists, such as "
Royals" by
Lorde, to
YouTube, before posting a few original tracks on their
Bandcamp page, including "Here Me Now" and "First Time", as well as the EP
At Peace in Pieces. In 2014, Newton left the band and was replaced by Possum Plows. They toured Australia, and in March 2015, they announced that they had changed their name to OpenSide, inspired by the sport
Quidditch from the
Harry Potter series, where one of the positions is Openside Chaser.
2015–2020: OpenSide In March 2016, OpenSide signed with
Warner Music NZ, and later that year, they released their debut EP,
Push Back, which peaked at no. 2 on the New Zealand Music Albums chart and no. 12 on the New Zealand Album chart. The single "Letting it Out" reached no. 2 on the New Zealand Heatseeker Chart. In September 2016, they were chosen to open for
Ellie Goulding,
All Time Low,
Ladyhawke,
Fall Out Boy, The band later announced that they would be releasing a
comic book at the
2018 Auckland Armageddon. The single was followed by the EP
Episode One: Character Flaws. In December, the band performed at the
Rhythm & Vines music festival. In February 2019, OpenSide performed at
Big Gay Out. In March, they released the single "Waiting for Love", from the EP
Episode Two: Waiting for Love, which followed in May. On 16 January 2020, OpenSide announced their breakup via Facebook.
2021–2023: Cellarr In May 2021, the former members of OpenSide, not including Plows, reunited under the name Cellarr and released the single "LUV". In September 2022, they issued their first EP,
Better (feat. Rhys Rich). In February 2023, they released their second EP,
Golden Minds Resort. In September, they published the single "Everybody Else",{{cite web|url=https://sniffers.co.nz/article/60807-2 |title= Aotearoa indie-pop trio Cellarr share sentimental new single, 'Everybody Else' ==Band members==