Nicole Zefanya (born 24 January 1999), known professionally as NIKI, is an Indonesian singer-songwriter. She is currently based in the United States and signed with the record label 88rising. She has released two full-length studio albums, MOONCHILD (2020) and Nicole (2022). Her debut headlining concert tour, Nicole World Tour (2022–2023), visited over 40 cities across North America, Asia, Australia, and Europe.

NIKI has garnered global recognition for her songwriting and musicianship and is among the most popular female artists from Indonesia. In 2020, NIKI was listed among Forbes 30 Under 30 Asia.

NIKI was born on January 24, 1999, and was raised in Jakarta, Indonesia. NIKI taught herself how to play and write music from a young age, after receiving her first guitar at 9 years old.

At 15, NIKI won a contest to perform as the opening act for Taylor Swift’s The Red Tour in Jakarta. As a teenager, NIKI maintained a YouTube channel, on which she uploaded original songs and covers, performed on acoustic guitar and filmed in her bedroom.