Each 'swan' was to perform their favorite song as the idol singer chose Sunmi's "Gashina".� While showing Cheng Xiao in the practice room, her fellow members commented, "Entice them with your Black Swan appeal", "It fits well with Cheng Xiao's image."

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She followed it up as Cheng Xiao illustrated her graceful gestures matching to the beat of Sunmi's hit track.

Cheng Xiao added, "I felt like I could've done slightly better.� I wanted to bring about a more ballerina-like pose, however, I will do better next time."