F(x)

f(x) ( /ˌɛf ˈɛks/; Korean: 에프엑스) is a South Korean girl group formed by SM Entertainment in 2009. The name is a play on the mathematical notation for function. The f stands for flower and the x represents the female's double x chromosome. f(x) strives to be the kind of girl group that can change and adapt to many situations.^{[citation needed]} The group members have also been nicknamed "function girls". The group made their debut on September 5, 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.

Real Name: Song Qian

Position: Leader, Vocalist, Main Dancer

Birthday: February 2, 1987

Birthplace: Qingdao, Shandong

Nationality: Chinese

Languages: Chinese and Korean

Blood Type: A

Education: Beijing Dance Academy

Hobbies/Specialties: Traditional dance, Jazz dance, Korean

Casted: 2007 Beijing, China SM Casting System

Height: 168 cm

Group leader.
Starred in variety show Invincible Youth (2010).
Starred in variety show We Got Married with 2PM’s Nichkhun (2010-2011).

• She likes coffee, healthy food, grandma’s cooking and sparkly items
• Her idols are Faye Wong and  Zhang Ziyi
• For her the most perfect women is Song Hye Gyo
• Her favorite song is  LA chA TA
• She closed with Kyuhyun (Super Junior), Zhoumi and Henry (SJM), Gyuri (KARA) and Tiffany (SNSD)

Real Name/English Name: Amber Josephine Liu

Chinese name: Yoo Il Woon

Position: Main Rapper, Vocalist

Birthday: September 18, 1992

Birthplace: San Fernando Valley

Nationality: Taiwanese-American

Languages: Chinese, Korean and English

Religion: Christian

Blood Type: B

Family: Parents and Older sister

Recorded Spread Its Wings with Luna and Krystal, OST for God of Study (2010).
Featured in Taiwanese singer Danson Tang’s I’m Back music video (2010).

• She is included on SM’s Dinosaur family with Super Junior’s Donghae and SHINee’s Jonghyun
• She was selected from a global audition held in 2007
• She developed a hobby of rapping at a young age.
• She enjoys playing basketball
• She is also a member of ‘Team Short’ along with 4minute’s Jiyoon and T-ara’s Eunjung because of their short hair and rapper position in their group.

Real Name: Park Sun Young

Position: Main Vocalist, Lead Dancer

Birthday: August 12, 1993

Nationality: Korean

Blood Type: A

Height: 153 cm

Casted: 2006

Siblings: Twin Sister, Brother

Duet with Krystal in Hard but Easy, drama OST for Taming the Heir; and also in Calling Out, drama OST for Cinderella Sister (2010).

Recorded Spread Its Wings with Amber and Krystal, OST for God of Study (2010).Featured in special group G20′s Let’s Go (2010).

Solo in Beautiful Day, drama OST for Please Marry Me (2010).

Duet with SuJu’s Yesung in And I Love You, drama OST for President (2010).
Starred in Legally Blonde musical (2011).
Co-host of The Show music program with Secret’s Hyosung (2011).

• Chinese is one of her specialities
• Many people say she resembles BoA
• IU is her close friend!
• She wants to meet Chaeyeon
• Her ideal partner is someone that is dedicated towards their work, loves music and knows how to value it, appearance like Takuya Kimura Fashion style and has a job like her
• Her other role models are Lee Junhyung, BoA, Whitney Houston, and Brown Eyed Soul

Real Name: Choi Jin Ri

Position: Vocalist, Rapper, Visual/Image of the group

Birthday: March 29, 1994

Birthplace: Yangsan, South Gyeongsang

Hometown: Busan

Nationality: Korean

Blood Type: O

Height: 169 CM

Family: Parents and Older brother

Religion: Christian

Casted:  2005 (after drama SeoDongYo Sunhwa Princess)

Drama/Movies: The Ballad of Seo-dong, Love Needs A Miracle, Vacation, Drama City, Puch Lady, BABO, Sammy’s Adventure

Child actress, starred in movies Babo and Punch Lady etc. before f(x) debut.
Co-host of Inkigayo music show (2010-2011).

• She is the tallest in the group
• Sulli usually writes journal on pretty pocket notebook.
• Sulli dislikes tight clothes. she is more likely to prefer box t-shirt and hotpants with leggings under it.
• Sulli’s must-have item is perfume.
• Sulli has a complex about her fingers. She wishes she could have long and thin fingers.

Real Name: Krystal Jung/Jung Soo Jung

Position: Lead Vocalist, Maknae

Birthday: October 24, 1994

Blood Type: A

Birthplace: San Francisco

Nationality: Korean

Height: 165CM

Hobbies/Specialties: Acting, Dance

Casted: 2006 SM Casting System

Languages: English, Korean, Chinese

Siblings: Parents and older sister (Jessica of SNSD)

Duet with Luna in Hard but Easy, drama OST for Taming the Heir; and also in Calling Out, drama OST for Cinderella Sister (2010).
Recorded Spread Its Wings with Amber and Luna, OST for God of Study (2010).
Co-host of The M Wave music show with MBLAQ’s Cheondoong (2010).
Starred in sitcom More Charming by the Day (2010).
Solo in Because of Me, drama OST for Sign (2011).

• When SM Town concert in LA, at Sheraton Hotel she signed for all her fans until the security lady told her to stop
• She can speaks English, a bit Japanese and Chinese
• She loves taking sel-ca
• Many people said that she looks like SNSD’s Yoona and Yuri instead of her sister Jessica
• She will picks someone who is uglier than her as her boyfriend, because she doesn’t want her boyfriend have a lot of girlfans and keep stalking him when they’re dating