Debut : 2010

Member : Park So-jin
Year of birth : 1986
Height : 166 cm
Education : Young-nam University, Mechanical Engineering (Leave of absence)

Member : Woo Ji-hae
Date of birth : May 14, 1989
Physique : 163 cm, 43 kg
Education : Sunggyungwan University, Dance (leave of absence)

Member : Bang Min-ah
Date of birth : May 13, 1993
Physique : 165 cm, 47 kg
Education : Jeonseon Girls High School

Member : Yoo-ra
Real name : Kim Ah-young
Physique : 168 cm, 49 kg
Education : Dongdeok Woman's University, Broadcast/Entertainment

Member : Lee Hye-ri
Date of birth : June 9, 1994
Physique : 167 cm, 47 kg
Education : Seoul Performance Arts High School




The group Girl's Day started to gain much attention even before their debut thanks to extensive promotions via social networking sites. An official cafe, YouTube channel, and Twitter accounts for all of the members were created even before their official release. One of their promos even featured dance flash mobs which spread and received much attentions.

The five membered-group finally debuted in 2010 with "Tilt My Head", which unfortunately didn't do as well as expected. About two months following their release, September of 2010, the group announced that two of their original members -- Ji-sun and Ji-in -- would be leaving the group. Ji-sun decided to study music more to hone her craft better, while Ji-in wanted to focus more on her acting skills.

Two days later, the group gained two new members: Yoo-ra and Hye-ri. Girl's Day wasted no time in releasing their next single in October, which did a little better than "Tilt My Head". The girls started to gain more attention for being featured on "We Are Dating", a reality show spin-off of "We Got Married". They were paired off with the members of U-KISS.

They then released "Twinkle Twinkle" in March of 2011 which was their best release up until that point. They were announced to be the Weekly Most Popular Track by Melon in early April, an honor attained through a criteria of combinging streaming hits, downloads, and user votes. "Twinkle Twinkle" is a re-interpretation of an '80's hit, "Round And Round" by Nami.



Girl's Day Party #1 (EP, July 9, 2010) : 갸우뚱 / Tilt My Head, Shuppy Shuppy, Control

How About Me (single, July 22, 2010) : 나 어때 / How About Me

Girl's Day Party #2 (single, October 29, 2010) : 잘해줘봐요 / Try And Be Good To Me

Girl's Day party #3 (digital single, March 18, 2011) : 반짝반짝 / Twinkle Twinkle