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The EP peaked at #14 on the Gaon Album Chart. On February 22, 2012, Brave Girls released their second mini-album Re-Issue and held a promotional showcase for the album that included a guest performance from Teen Top. At the 19th Korea Culture Entertainment Awards which was held on December 15, the group received the "Rookie of the Year" award. The full EP was released on July 29 and peaked at number 14 on the Gaon Album Chart, selling 1,606 copies. Brave Brothers stated that the song was homage to Kim Gun-mo's "Excuse". On July 28, Brave Girls released the lead single from their debut mini-album Back to da Future titled "Easily", which features Korean reggae artist Skull, and its music video. A music video for "So Sexy" was released on July 10. They then had their debut performance on KBS's Music Bank with promotional tracks "So Sexy" and "Do You Know".
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On April 7, they released their debut single album The Difference, along with a music video for title track "Do You Know". On March 31, 2011, Brave Brothers released two teaser images of the group, revealing the two concepts that the group would perform with. 2011–2015: Debut, Back to da Future, Re-Issue and hiatus īrave Girls at Superstar K 3 premiere, 2011. Seo-a also gained attention for her previous career as a model for various magazines and commercials. Yejin also gained attention due to the fact that she was 'Miss Seattle' at the Miss Korea 2008 competition, and because she bears a resemblance to actress Kim Sa-rang. Hyeran was then revealed on March 17, and gained attention because of her resemblance to singer Son Dambi and because of old dance rehearsal videos that led to her name being featured on video sites like Mgoon.
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She is the niece of Shin Ha-kyun, an actor known for his role in Welcome to Dongmakgol and Sympathy for Lady Vengeance.
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On March 14, 2011, Eunyoung was revealed as the leader of Brave Girls. On September 21st 2010, Brave Brothers revealed he is launching a new 4 member hiphop girl group called Brave Girls.
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