[Edit]
Victoria - [Leader, Vocalist, Main Dancer ]

Birth name: Song Qian
Birth Date and Place: February 2, 1987 in Qingdao, Shandong, China
- Female lead in Kangta's "Eternity", SHINee's "Replay", Super Junior-M's "U" and TRAX's "Let You Go" (along with Kim Hee Chul) music video

Amber - [Main Rapper, Vocalist ]

Birth name: Amber Liu
Birth Date and Place: September 18, 1992 in the San Fernando Valley, California

Luna - [Main Vocalist ]

Birth name: Park Sun Young
Birth Date: August 12, 1993
- Featured vocalist in a song entitled "Get Down" with SHINee members Minho and Key for their mini-album Year of Us.

Sulli - [Vocalist, Sub-Rapper ]

Birth name: Choi Jin Ri
Date of birth: March 29, 1994
- Debuted as a child actress in the 2005 Korean television drama The Ballad of Seo-dong
- Featured in DBSK's Vacation, playing Micky's childhood love interest
- Featured in "Punch Lady"

Krystal - [Lead Vocalist ]

Birth name: Krystal Jung, Jung Soo Jung
Birth Date and Place: October 24, 1994 in San Francisco, California
- Younger sister of Girls Generation member Jessica Jung
- Female lead in SHINee's "Juliette" music video



Krystal Jung was spotted by SM Entertainment in 2000, which earned her a small role in a short segment of Shinhwa's "Wedding March" music video. SM discovered Luna Park in 2006, while she was performing for a television show. In September 2007, SM discovered Victoria Song at a dance competition in Beijing, China, which brought her to South Korea for a modeling and acting career. A month later, Amber Liu was casted from an audition in Orange County, California.

While Krystal was the first member to make a media appearance, having appeared briefly in a Lotte commercial in 2002, Sulli Choi was the first member to make a debut, officially debuting as a child actress in September 2005 as the role of young Princess Sun-hwa in the SBS television drama, The Ballad of Seo-dong. Victoria was the second; she made her first appearance as a model for SPRIS with Korean actor-singer Lee Jun-ki in early 2008 with announced modeling activities in the future. Krystal began training for f(x) in 2006 along with Sulli and Luna. Amber joined them in early 2008, with Victoria the last to join the group, in the latter months of 2008.



SM released a teaser preview of the group via YouTube on August 24, 2009, introducing them as "Asia's Pop Dance Group." For five days, SM invidually released information through news portals and posted pictures of each member on SM Town's official website, starting with Sulli on August 26. Amber was revealed on August 27, Krystal on August 28, Luna on August 29, and Victoria last on August 30.

The group's first single "Lachata" was digitally released on September 1, followed by a 40-second teaser of their music video uploaded to YouTube. f(x) had their first performance at a showcase specifically assigned for their debut at the Samseong-dong Fashion Center on September 2, in which the event was hosted by Leeteuk and Sunny.The full music video of "Lachata" debuted at the showcase, and was released online the next day. The group debuted their first broadcasted performance of "Lachata" on MBC's music show Show! Music Core on September 5.



Single

Lachata - September 1, 2009
Chocolate Love - October 7, 2009
NU ABO - May 3, 2010

Album

츄~♡ (Chu~♡) [November 9, 2009 ]

01. 츄~♡ (Chu~♡)
02. Step by me
03. You Are My Destiny

NU ABO - May 4, 2010

01. NU ABO
02. Mr. Boogie
03. ce Cream
04. ME + U
05. Surprise party
06. Sorry (Dear. Daddy)