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In page Virgin (After School album):

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On 18 April 2011, Pledis released a photo teaser of the album, featuring fourth generation member E-young. The track-listing and three other member photos followed, which were separated into third, second, and first generation members. On the day before the album's release, Pledis uploaded the video of their lead track "Shampoo" and "Let's Step Up!" on their official channel at YouTube. Their comeback stage was held on KBS Music Bank and they performed "Shampoo" and "Let's Step Up".[citation needed]