Wiki
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Release Date
21 April 2011
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Length
6 tracks
The group worked with hit composers and songwriters like Lee Sang Ho, Lim Sang Hyuk, Jeon Da Eun, and Wheesung to create four fresh songs including their title track O.K, an explosive rock and electronic dance number, and the sweet, lyrical ballad Only One. All the members helped write the lyrics for Bling Girl, which is composed by Jin Young.
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