Pre-Debut

Leader Hyorin had auditioned twice for JYP Entertainment beforehand, being accepted on the second try. She was initially planned to debut in a trio group along with missA's Min and Secret's Jieun. Plans, however, fell and she was dropped from the label. She later auditioned for Starship and was accepted.

Member Soyou auditioned for Starship, singing a cover of Navi's "On The Road".

Sistar made their first appearance through a Céci magazine photo in England shoot on March 19, 2010 for the clothing company FUBU.

2010: Debut - Push Push

The MV teaser for their debut song "Push Push" was released on June 1, 2010. Two days later, on June 3, 2010, Starship released the full music video for Push Push. Sistar had their debut performance at Music Bank on June 4.

The group wrapped up promotions for their Push Push on July 26.

Second Single: Shady Girl

The group released their 2nd single "Shady Girl" on August 25, 2010. The MV teaser was released on August 24, 2010 and the full music video was released a day later. The MV also features Super Junior's member Kim Heechul.

At this time Sistar were beginning to do international advances, performing in other Asian countries. On September 14, Sistar were invited to perform in Japan's "Hallyu Music Festival" as the only Korean girl group present. On October 10, Sistar also made their debut in Thailand, performing their hit songs "Push Push" and "Shady Girl" on Thailand's "Teen Superstar" show.

Third Single: How Dare You & Year End activities

The teaser for "How Dare You" was released on November 23, with the full music video planned to be released one day after. However, the border skirmish between North and South Korea at Yeonpyeong caused the music video to be pushed back almost a week. The full music video was finally released on December 2. "How Dare You" swept the music charts and was ranked at #1 on various music sites such as MelOn, Mnet, Soribada, Bugs, Monkey3, and Daum Music.

On December 9, 2010, the group attended the Golden Disk Awards, being awarded with Newcomer Award.

On December 17, 2010, Sistar won the Music Bank award for their song "How Dare You".

[edit]2011: SISTAR19

SISTAR wrapped up their final rounds of "How Dare You" promotions in mid-January.

On April 27, it was announced that SISTAR will be debuting a sub-unit, SISTAR19 with members Hyorin and Bora. The teaser for their debut song "Ma Boy" was released on April 29, 2011, and the full music video on May 2, 2011. They released their digital single, titled "Ma Boy", on May 3. Sistar19 had their debut performance on M! Countdown on May 5, 2011

2011: First full length album: So Cool

On July 31, it was reported that SISTAR would be returning with their first official album on August 9th, titled "So Cool". In addition to the news, it was also reported that member Soyu lost 8kg(roughly 16 lbs.) in preparation for their comeback.

Starship Entertainment stated that "fans can look forward to a more charismatic side of SISTAR".

Birth Name: Yoon Bo Ra (윤보라)

Birthday: Jan. 30, 1990

Position: Main Rapper, Vocalist, Main Dancer

Birth Name: Kim Hyo Jung (김효정)

Birthday: Jan. 11, 1991

Position: Leader, Main Vocalist

Birth Name: Kang Ji Hyun (강지현)

Birthday: Feb. 12, 1992

Position: Lead Vocalist

Birth Name: Kim Da Som (김다솜)

Birthday: May 6, 1993

Position: Vocalist, Maknae

source [wikipedia]