SISTAR (씨스타, also stylized as SI★, SiSTAR) is a four-member South Korean girl group under the management of Starship Entertainment. The group consists of leader Hyorin (효린), Bora (보라), Soyu (소유) and Dasom (다솜). On June 3, 2010, they released their debut single "Push Push (푸쉬푸쉬)" and made their debut on Korean Broadcasting System (KBS) Music Bank. On August 25, they released their second single "Shady Girl (가식걸)" and followed up with "How Dare You (니까짓게)" on November 29. On May 5, 2011, Hyorin and Bora made their debut in a sub-group called SISTAR19 (씨스타19) on M! Countdown with "Ma Boy (마보이)".