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In page Song Ji-eun:

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After Secret's success with "Shy Boy", TS Entertainment announced that Song will make her solo debut with the song "Going Crazy".[3] The song was dubbed as an "emotional ballad track" and "different to what she's shown through Secret".[citation needed] The single, released in March 2011, was a success and peaked at number one on Gaon Singles Chart, making it Song's and Bang's first number one single in Korea.[4]