Bergan started releasing covers on YouTube at the age of 16, eventually signing a record deal with Warner Music Norway in 2013.

In 2015 she attained mainstream success in Denmark and Germany with her single "All Hours", before breaking through in her native Norway in 2016 with "Arigato" peaking at number one.

She returned to the number one spot in 2018 on VG-lista after collaborating with K-391, Alan Walker and Seungri on "Ignite".

On 11 May 2018, K-391 and Alan Walker released the single "Ignite" which featured Julie Bergan and Seungri, which peaked at number one on the Norwegian VG-Lista chart and at number thirteen on the Swedish singles chart.

In May "Don't Give Up on Me Now" was released together with R3hab, followed by the single "Outlaw", and in the middle of 2019 she embarked on the Hard Feelings tour, which took her across Europe.

In July came her second collaboration with SeeB entitled "Don't You Wanna Play", the third followed in 2022 with "Always Will", the song was written by Mimi Webb, among others.

In November 2021, David Guetta released the song "Family", which was intended to show the cohesion of the music industry during the COVID-19 pandemic.

At the beginning of 2022, she and friends opened the Crewtrening gym in Oslo, where she now trains herself and also gives courses.

In late 2022, Alan Walker wanted to release the song "Ritual" with Julie Bergan, which she also co-wrote, but a dispute ensued.

On 16 June 2023, she performed for the seventh time at the annual VG-Lista Topp 40 live show at City Hall Square in Oslo.

The dance choreography was created by Mona Berntsen, who had previously worked with Justin Bieber and Alicia Keys, among others.

[9] On 2 August, Julie released a song with swedish DJ and music producer Raaban titled "ICONIC".

[11] Due to release of her EP she did her first DJ set at London Pub & Club in Oslo.