[1] The group cemented their popularity in South Korea with the release the songs "To My Boyfriend" in 1998, "Eternal Love" in 1999, and "Now" in 2000.

As for the fourth member, Annie Lee (who formed Tashannie with Yoon Mi-rae) was accepted, but decided to depart after a few months.

Lee Hyori, who was found while in a mall taking sticker pictures with friends, was brought into the group.

In contrast, Fin.K.L's initial strength was in R&B ballads led by Ock's vocals; this was shown by their first single "Blue Rain".

Fin.K.L's next hit "To My Boyfriend" (Korean: 내 남자친구에게) was a more typical pop song and followed popular conventions at the time.

(Yuki Hsu, a Taiwanese singer, sang a remake version of "To My Boyfriend" not long after the song's success in South Korea.)

S.P.E.C.I.A.L also contained a remake version of "Like an Indian Doll" (Korean: 인디언 인형처럼), a popular song sung by Na-mi (나미) in 1989.

[12] Because of its release date, Fin.K.L created a "winter" theme for their performances and dressed in wintry outfits to promote "White".

Unlike the previous catchy tunes and cute outfits, Fin.K.L members were dressed in semi-formal attire for performances for the hit single "Now" (the album's title song).

Instead of targeting their main fanbase of teenage listeners, this album appealed to adults in their 20s and 30s by arousing nostalgia.

This was accompanied by a video depicting four tragic stories mainly about the loss of innocence: Sung portrays a masseuse, Ock a sick florist, Lee Jin a frustrated artist who eventually kills herself, and Lee Hyori as a boxer who loses a finger.

At the end of 2005, the group made a comeback and released "FinKL", a digital single that had 4 songs (including the title track) and a music video.

However, due to lack of promotion (as the group did not perform on the various music shows), the single failed to chart.

Sung also starred as Heo Yi-nok in the drama Hong Gil-dong (Korean: 쾌도 홍길동) co-starring Kang Ji-hwan and won a Best Couple award.

Both Sung and Lee Jin won "Best Actress" in their respective categories (drama and comedy) at the end-of-year awards in 2002.

[19] In September 2010, Ock became the host of the KBS Cool FM music program Gayo Plaza (가요광장).

[21] The television series, Camping Club, featured the Fin.K.L members reuniting and traveling around the country; the show premiered on July 14.