AOA is following in the footsteps of top stars like Go So Young, Han Hye Jin, and Han Chae Young as the fifth model of hair clinic brand, 'Kerasys.'  This is the first time they've opted for such younger models, as well, changing their target demographic.

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On April 4, the company announced its new muse, AOA, stating, "Through putting the much younger new faces of AOA and Seolhyun out there, we will get 'Kerasys's differentiated product power out there more familiarly," expressing a desire to change the product image by casting aside the 'luxury' image in order to get a hotter response from youths. 

The hair dyes are also being named 'Seolhyun Brown' and 'ChoA Gold,' interestingly enough!