On 23 February 2015, they released their debut studio albumHei. The album peaked at number 1 on the Norwegian Albums Chart in week 46 of 2015 after having charted for 35 weeks, the last 20 not leaving the top ten. The album includes the single "Plystre på deg". On 24 July 2015, they released the single "Elektrisk", featuring vocals from Katastrofe. The song peaked at number 3 on the Norwegian Singles Chart. On 25 September 2015, they released the single "Ei som deg" with Inner Tier. The song peaked at number 15 on the Norwegian Singles Chart. On 6 November they released the second version of their album Hei, "Hei " with the same songs and some extras, one of the extras is Elektrisk. In May 2016, the duo released three singles. The first, "Girls", featuring Madcon, debuted at number 1 in Norway and became their second single to reach the top 100 in Sweden after "Elektrisk". The second and third, "Heartbeat" and "I Don't Wanna Fall in Love", followed just days after the release of "Girls" and debuted at numbers 21 and 37, respectively. They followed up "Girls" with the singles "Light It Up" and "One More Second". In November 2016, they released their first English album titled Together. The album includes their hit songs "Girls", "Heartbeat", "Light It Up" and "One More Second". In the week after its release, Together debuted at number 1 in Norway and Sweden and number 6 in Finland. As the Young Talent Act of the 2016 Nobel Peace Prize Concert, they performed "Without You" and "Bae" at Telenor Arena in Norway on.
2017–present
On 13 May. On 21 May 2017, they released the single "Like It Like It" alongside American rapper Silentó. On 1 July, they released the single "First Kiss". The same month, on 14 July, they performed on Swedish Crown Princess Victoria's 40th birthday with their own song written especially for her. In late July, they released the single "Dance with You". On 15 October 2017, they released their single "Make You Believe in Love". The single reached 34th place in Norway and 47th place in Sweden. It also featured in CelebMix's 21 songs by Under-21s in 2018. On 4 November, they released their single "One Flight Away". On 15 November they released their single "Never" On 17 November, they released a new album named Moments. On 27 September, they released their single "Invited".
