Dark Angel is the second studio album by Lee Hyori, released on February 11, 2006. The album features singles "Get Ya!", "Shall We Dance?", and "Straight Up". It is notable for the plagiarism controversy regarding her first single, "Get Ya!", which was accused of copying Britney Spears' single "Do Somethin'". Although a follow-up single was quickly prepared, sales were lower than expected, and promotional activities were stopped.
Her first single from her album, "Get Ya!" was accused of plagiarizing Britney Spears's "Do Somethin'," as proposed by the composer of the American pop star's hit. After the news started to spread, Lee and her record company announced that promotion of the single would be quickly halted, and that she would have a short break from activities in order to promote her follow-up single "Shall We Dance?". This was the last single of the album to be promoted by Lee, although "Straight Up" was released as the last single from the album.