||This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2010)|
(L-R)Krystal, Sulli, Victoria, Amber, Luna
|Origin||Seoul, South Korea|
|Genres||Pop, rock, electro-pop|
|Labels||S.M. Entertainment (South Korea)
Avex (Japan)Avex Taiwan (Taiwan-R.O.C.)
United Asia Management
|Associated acts||SM Town|
|This article contains Korean text. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Hangul or Hanja.|
f(x) (Korean: 에프엑스; pronounced /ˌɛf ˈɛks/) is a five member South Korean girl group formed by SM Entertainment in 2009. The name is a play on the mathematical notation for function, and when input with different ‘x’, there can be many different outcomes. f(x) strives to be the kind of girl group that can change and adapt to many situations. The group members have also been nicknamed “function girls”. The group made their debut on September 1, 2009 with release of a digital single “La Cha Ta” (stylized as “LA chA TA”). The quintet consists of Victoria, Amber, Luna, Sulli and Krystal.
 Pre-debut history
Krystal Jung was first spotted by SM Entertainment in 2000 on a family visit to Korea, which earned her a small role in a short segment of Shinhwa’s “Wedding March” music video. Sulli Choi first debuted as a child actress in 2005 when she was selected to play young Princess Sun-hwa in the SBS television drama, The Ballad of Seo-dong. In 2006, SM Entertainment recruited Luna after seeing her performing on SBS‘s television program, “Truth Game”. Victoria was spotted by a S.M. Entertainment’s agent at a Beijing dance competition, and later joined the company. Two months later, Amber was cast through SM’s Global Auditions in Los Angeles, California, where she was one of two people (one male) selected to be trainees.
 2009: Debut, first single album and collaborations
SM first released a teaser preview of the group via YouTube on August 24, introducing them as “Asia’s Pop Dance Group.” For five days, SM individually released information through news portals and posted pictures of each member on SM Town‘s official website, starting with Korean member Sulli on August 26, Taiwanese-American member Amber on August 27, Korean-American member Krystal on August 28, Korean member Luna on August 29, and lastly the Chinese member Victoria on August 30.
On September 1, the group’s first single “La Cha Ta” (stylized as “LA chA TA”) was digitally released. Following their first performance at the Samseong-dong Fashion Center on September 2, the music video was screened and released online the next day. The group’s first broadcast performance of “La Cha Ta” was held at MBC‘s music show Show! Music Core on September 5.
On October 7, the group also released the electro-pop version of the digital single, “Chocolate Love“, alongside their label mate Girls’ Generation. The single was released for the promotion of the 4th edition Blacklabel series of LG CYON phone, LG Chocolate (BL40).
On November 9, f(x) released their first single album, Chu~♡, consisting of 3 songs.
 2010: First mini-album, Amber’s hiatus, and SMTown World Tour
On January 2, the group released the Chinese track, “Lollipop”, a cover version of the 1958 song “Lollipop” – written by Julius Dixson and Beverly Ross, for which they collaborated with the Chinese boy band, M.I.C, to promote the LG Cyon phone. The music video was digitally released on January 12, 2010.
On February 27 and 28, the group appeared once again as special guests on Into the New World concert in Olympic Fencing Gymnasium.
On May 4, f(x) released their first mini-album, Nu ABO, consisting of 6 tracks. The lead single, “Nu ABO“, topped online music portal charts Monkey3, Dosirak and Bugs. The song also made it to the Gaon Chart weekly number-one singles. The music video for the song was released on May 6. The group made their live comebacks on KBS’s Music Bank on May 7, MBC’s Music Core on May 8 and SBS’s Inkigayo on May 9.
Amber went on hiatus on June due to an ankle injury. The remaining group activities of the year 2010 were carried out without her.
On July 17, the group started performing their next promotional single, “Mr. Boogie”, from their mini-album, Nu ABO. They had their first performance for the song on MBC’s Music Core.
f(x) also participated in the SMTown Live ’10 World Tour alongside their label-mates on August 21 at Seoul Jamsil Olympic Stadium. They also performed in Tokyo, Shanghai, Los Angeles and Paris (2011) on later dates. This marks the first time f(x) and their fellow label-mate groups performed outside of Asia.
On November 24, 2010, Avex Entertainment, as well as SM Entertainment Japan, released a statement about the renewal of contracts of SM artists signed to Avex. It stated that f(x) is now signed to Avex, and its albums will be released under the said label in Japan, Taiwan, China and Hong Kong.
 2011–present: First album Pinocchio and Hot Summer
The first teaser photo for their full-length album entitled Pinocchio was released on April 7, 2011 at the f(x) official website. The MV teaser for the lead single, “Pinocchio (Danger)” (a remake of Kristine Elezaj‘s “Razor”), was released on April 15, 2011. The album was released on April 20, 2011 and the group held their first comeback stage through KBS’s Music Bank on April 22, 2011.
The group have achieved 8-wins with “Pinocchio (Danger)” from the music shows, namely M! Countdown, Music Bank and Inkigayo.
On June 8, it was announced that f(x) would be releasing their repackaged album of Pinocchio, titled “Hot Summer”, on the 14th. It included all 10 songs from their first album and new track “Hot Summer” (a remake of Monrose‘s “Hot Summer”, written by Thomas Troelsen and Remee), their OST song for “Paradise Ranch” and digital singles “Chu” and “La Cha Ta.”
It was revealed at S.M. Town in Tokyo that f(x) would be debuting in Japan in January 2012.
|Stage name||Birth name||Date of birth||Position|
|Victoria||빅토리아||Sòng Qiàn||宋茜||February 2, 1987 (1987-02-02) (age 24)||Leader, Vocalist, Main Dancer|
|Amber||엠버||Amber Josephine Liu||劉逸雲||September 18, 1992 (1992-09-18) (age 19)||Vocalist, Main Rapper|
|Luna||루나||Park Sun-young||박선영||August 12, 1993 (1993-08-12) (age 18)||Main Vocalist, Lead Dancer|
|Sulli||설리||Choi Jin-ri||최진리||March 29, 1994 (1994-03-29) (age 17)||Vocalist, Visual|
|Krystal||크리스탈||Jung Soo-jung||정수정||October 24, 1994 (1994-10-24) (age 17)||Lead Vocalist,Lead Dance, Maknae|
 Other activities
In late 2009, Luna and Krystal contributed to the soundtrack of television series Invincible Lee Pyung Kang with a duet, “Hard but Easy”. In early 2010, Krystal, Luna and Amber also recorded the song “Spread Its Wings” for the soundtrack of the KBS‘s drama, God of Study. Krystal and Luna recorded a duet song for the KBS’s drama Cinderella’s Sister original soundtrack, called “Calling Out”. In late 2010, Luna released a single “Beautiful Day”, as part of the official soundtrack of the KBS drama ‘Please Marry Me’. On December 23, 2010, a duet collaboration between Luna and Super Junior‘s Yesung was released, titled “And I Love You“, for the second original soundtrack of KBS’s President.
Krystal appeared on a daily Korean sitcom called “More Charming By The Day” which started from March 22, 2010 to November 2, 2010. The sitcom has total of 138 episodes but Krystal appeared from the 60th episode.
On April 2, 2010, Y-Star started airing first variety show of the group, Hello f(x). The program consisted of four episodes which showed close coverage on their preparations for the first mini-album, Nu ABO. On October 2, 2010, their second reality show, Koala, started airing on MBC‘s Every1. The show featured the group’s background life during the SMTown Live ’10 World Tour.
From May 2010, F(x) members started to appear in variety show on regular basis. Victoria was casted in We Got Married to become a couple with Nichkhun from 2PM. They have been on the show since. She was also casted as regular member of Invincible Youth, and appeared in the show until it ended in December 2010. Luna appeared in Star King and became regular member of the show. She went on to win “New Star” (신인상) award in 2010 SBS Entertainment Award (2010 연예대상). Sulli was casted as the co-host of Inkigayo (인기가요) along with Jo Kwon from 2AM and Jung Yong Hwa of C.N.Blue. She is still hosting the show with Jo Kwon, along with new co-hosts IU and Lee Gi Kwang
In late 2010, members Victoria, Sulli and Krystal became model endorsers for the clothing brand, Calvin Klein‘s X Jeans. A music video for the song, “Beautiful Day”, was released in December 2010 to endorse the brand. The group also endorsed another clothing brand, K-Swiss, for their 2010 winter collection.
In addition to those endorsements, Victoria also was featured in Kangta’s music video of his song 爱，频率 (“Love，Frequency”/”Breaka Shaka”).
From May 2011 through August 2011, Krystal appeared as a contestant on Kim Yuna‘s celebrity ice skating show, “Kim Yuna’s Kiss and Cry.” After consistently scoring near the top of the competition, Krystal and her partner Lee Don Hun won the show with their flawless performance of “Carmen.” Krystal and Lee Don Hun were later invited to participate in “Kim Yuna’s Ice Show–All That Skate Summer 2011” on August 14th and 15th.
 Korean Discography
- Studio Albums
- Pinocchio (2011)
- Repackaged albums
- Hot Summer (2011)
- Extended plays
- Nu ABO (2010)
 Music videos
|Year||Title||Length||Official MV On YouTube||Notes|
|“La Cha Ta” (stylized as “LA chA TA”)||3:26||SMTOWN/sment On YouTube|
|“Chocolate Love” (electro-pop version)||3:49||SMTOWN/sment on YouTube||Commercial film for the LG’s Chocolate.|
|“Chu” (stylized as “Chu~♡”)||3:18||SMTOWN/sment on YouTube|
|“Lollipop”||3:14||Commercial film for LG’s Lollipop.|
|“Thrill Love”||2:57||OST for the drama of Hungry Romeo, Luxury Juliet.|
|“Nu ABO”||3:49||SMTOWN/sment on YouTube|
|“Beautiful Day”||1:22||SMTOWN/sment on YouTube||Commercial film for Calvin Klein‘s X Jeans.|
|2011||“Pinocchio (Danger)”||3:13||sment on YouTube|
|“Hot Summer”||3:46||SMTOWN on YouTube|
 Supporting act
 Music Show awards
 Music Bank
|2011||April 29||” 피노키오 (Danger)”|
 M! Countdown
|2011||May 5||” 피노키오 (Danger)”|
|June 30||” Hot Summer”|
|2011||May 8||” 피노키오 (Danger) “|
|June 26||” Hot Summer “|
 Other Media
On 1 June 2011, S.M. Entertainment, together with NEOWIZ Internet Corporation, Ltd, released an iPhone application which features f(x)’s album, Pinocchio. The app can be downloaded for free on iTunes. and f(x)’s First Mini Album “NU ABO” for iPhone/iPod Touch. The app can be purchased for US$4.99 on iTunes.
For more detail information see
 Television series
|2010||YStar “Hello f(x)“|
|2010-2011||MBC “f(x)’s KOALA“|
|2010 – Present||SBS “Star King”||members are recurring in the show|
 Television Non-series
|KBS||“Let’s Go Dream Team!”|
- Legally Blonde
- Coyote Ugly
- Official Fanclub Color:Periwinkle
Victoria (born 2 February 1987) is the group’s leader. Before her music debut, Victoria modeled for many known Korean and Chinese brands.
DOB: February 2, 1987
Spris model (with Lee Junki)
Smart model (with SHINee)
Chinese Samsung LCD Model
Chinese Anycall Anydream CF (with Rain)
SHINee Noona is so pretty lead female
Kangta In my heart someday MV lead female
Super Junior M “U” MV lead female
SHINee Photoshoot for Vogue Girl December 08 issue
Full Name: Amber Liu
Birthday: September 18, 1992
Position: Main Rapper, Vocalist
Real Name: Park Sunyoung
Birthday: August 12, 1993
Position: Main Vocalist, Lead Dancer
Real Name: Choi Jinri
Birthday: March 29, 1994
Position: Vocalist, Sub-Rapper
2005 Pretty Children award
Maru Child model
Casted as SM Trainee in 2005 after drama SeoDongYo Sunhwa Princess
Drama – Love needs no miracle
Movie – Babo as child Ha Jiwon
Movie – Punch Lady
Full Name: Jung Krystal (Jung Sojung)
Birthday: October 24, 1994
Position: Lead Vocalist
SHINee Juliette MV lead female
Yuhan Kimberly CF
OhDdooKi Curry CF
Lotte Chilsung Cider CF
SK, LG Telecom CF
Professor Yoon English class CF