ソン・シギョン、ダンス歌手に転向？「振り付け練習に3週間…全部忘れた」
Sung Si Kyung turns into a dance singer? ”I spent 3 weeks practicing choreography...I forgot everything”
Sung Si Kyung revealed the behind-the-scenes of choreography practice. On the 28th, SBS's "Sung Si Kyung with friends -
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