Oli London's debut K-Pop single Perfection (완벽) was released worldwide on February 3rd, 2019 and he became the first western male solo artist to ever release a K-Pop song and video.

The song is dedicated to Oli's favourite singer, Park Jimin of BTS who inspired him to make the song. Perfection is a feel-good, upbeat K-Pop track that resonates with young people of all nationalities and backgrounds. The song's message is that everyone is perfect in their own way and people should embrace and love who they are and do what makes them happy.