Chinese name: Song Qian
DOB: February 2, 1987
Birthplace: Qingdao, Shangdong, China
Starred in variety show Invincible Youth (2010).
Starred in variety show We Got Married with 2PM’s Nichkhun (2010-2011).
Real name: Amber Josephine Liu
DOB: September 18, 1992
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).
Real name: Park Sun-young (박선영)
DOB: August 12, 1993
Birthplace: Seoul, South Korea
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).
Real name: Choi Jin-ri (최진리)
DOB: March 29, 1994
Child actress, starred in movies Babo and Punch Lady etc. before f(x) debut.
Co-host of Inkigayo music show (2010-2011).
Real name: Jung Soo-jung
DOB: October 24, 1994
Birthplace: San Francisco, California, USA
Younger sister of Jessica, member of pop group Girls’ Generation.
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).