F (x) is the Asian Pop Dance girl group S.M.Entertainment launched the company in September 5, 2009.
F (x) composite members include captain Victoria Song Victoria (Chinese), Liu Yiyun Amber (American born Chinese), Zheng Xiujing Krystal (South Korea dual nationality) Shirley Sulli, Luna Pak Luna. F (x) as a singer, Liu Yiyun Amber (secret trainee), other people have been through the film, TV, MV, advertisement, arts are South Korea audience familiar.
In September 5, 2009 the f (x) official debut, with a digital single "LA CHA TA" musical activities in combination, quickly from the five glamorous girls won attention, song "LA CHA TA" has been sung more and more. Not only in Korea, Asian media like f (x) is also called "is expected to be a new forces" Asian woman combination wave of renewal, then ride this wave, debut for more than a month after f (x) officially launched the first solo album "Chu~", as the girl sweet kiss songs, also the interpretation of the f (x) belongs to the special cute.
In April 20, 2011 the f (x) issued a new "PINOCCHIO" album, album sales have soared, among all South Korean girl group sales in second, and with music album "PINOCCHIO" and "hot summer" follow-up album with music bank, M! CountDown popular song, a total of 10 A, rapid squeeze Korea first-line woman combination.
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.[citation needed]
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.She is now participating in Kim Yuna's skating show,'Kim Yuna's Kiss and Cry'.
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" (�2�1�3�7�1�8) award in 2010 SBS Entertainment Award (2010 �2�5�2�9�9�7�1�8). Sulli was casted as the co-host of Inkigayo (�3�7�8�5�7�5�3�9) 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 June 2010, Amber rapped in Korean and English for Taiwanese Mandopop artist Danson Tang on track, "I'm Back" from his third album The First Second.
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.[citation needed]
In addition to those endorsements, Victoria also was featured in Kangta's music video of his song 爱，频率 (Love，Frequency).
2011–present: First album Pinocchio and Hot Summer
It was announced by SM Entertainment that Amber returned from USA after a long leave since June 2010 and that f(x) are planning to release a studio album in the first half of the year.
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.
