[17] He also produced part of the "Blue Man Group" Speechless soundtrack[18] and worked on ProfJam's album #FFFFFF, which went platinum in Portugal.

[20][21][22] In 2019 he was highlighted by Billboard Dance as an emerging artist, describing his sound as ‘tough, but sophisticated and often experimental bass that often properly pummels.’[23] Holly also released official remixes for TOKiMONSTA, ZHU and Alison Wonderland in 2019.

[29] Holly additionally produced a number of hip-hop projects such as CL, Dok2, Lee Hi, Jay Park, Ramengvrl, AK AusserKontrolle, Wet Bed Gang and Kembe X.

[34] The mixtape includes collaborations with Baauer,[35] UnoTheActivist,[36] OG Maco,[3] Ugly Duck, Sebastian Reynoso, RahRah,[37] TOKiMONSTA and TEARZ.

[38][37] As part of the project Holly collaborated with the fashion designer and stylist Alexandra Moura,[39] and also did mixes for BBC Diplo & Friends[40] and Complex.