Heidemann began her musical career as a member of pop duo Karmin, with now-husband Nick Noonan. The duo gained fame because of their cover songs published on their YouTube account, which included "Look at Me Now", "Super Bass," and "Party Rock Anthem." The group later announced in 2012 that they had signed to Epic Records. The group released their debut EP, Hello, on May 7, 2012, to mixed reviews from critics. Despite the mixed critical reception, the EP was a commercial success supplemented by two hit singles: "Brokenhearted" reached the top 20 in the US Billboard Hot 100 charts, and the top 10 in New Zealand, Australia and the United Kingdom, while "Hello" reached number one on the Billboard Hot Dance Club Songs charts in the United States.

The duo followed Hello up by their debut full-length studio album, Pulses (2014), which saw less commercial success, and was supplemented by the single "Acapella." Following the conclusion of promotion for Pulses, Karmin left Epic Records and began releasing music independently. They released a slew of singles from 2014 to 2016 in anticipation of a second studio album. These included "Sugar", "Yesterday", "Along the Road", "Didn't Know You", and "Come With Me (Pure Imagination)". In 2016, Karmin released the Sugar EP in collaboration with Wild Culture. It features three remixes of "Sugar" and a remix of Riley Pearce's single "Brave". The duo released their second studio album, Leo Rising, on September 9, 2016.

Following the release of EP 1, Herby began work on her upcoming second extended play, EP 2. The first single off the EP, "Love Myself," was released on September 8, 2017. An accompanying music video was released the same day. On October 13, 2017, "Wifey" was released as the second single from EP 2, accompanied by a music video. EP 2 was made available for pre-order on November 17, 2017, and was released on December 1, 2017.