Fin.K.L is a South Korean girl group formed in 1998 by DSP Media. The group originally consisted of four members: Lee Hyori, Ock Joo-hyun, Jeon Ji-hyun, and Soo-young. They gained immense popularity in the late 1990s and early 2000s, known for their catchy songs and vibrant performances. Fin.K.L is often credited with paving the way for future girl groups in the K-pop industry. Their debut album, "Blue Rain," was a commercial success, and they produced several hit songs, solidifying their status as one of the first-generation girl groups in South Korea.