Ku has also written songs for numerous notable acts including Martin Garrix, Dua Lipa, Iggy Azalea, Zedd, and others.

That year, she was featured on the Dillon Francis and Skrillex track, "Bun Up The Dance"[1] and the Nicky Romero and Stadiumx song, "Harmony".

[7] At the end of the year, Ku was featured on the Party Favor single, "In My Head",[8] which reached number 7 on the Billboard Dance/Mix Show Airplay chart.

[15] 2018 also saw the release of two songs Ku co-wrote: MØ's "Mercy" (featuring What So Not and Two Feet)[16] and Rita Ora's "Soul Survivor".

[18] Ku was a featured artist on the 2018 NOTD and Felix Jaehn single "So Close", with a music video starring Sports Illustrated Swimsuit cover girl Camille Kostek.