Son Seung Yeon on 'Immortal Song 2' Unknown 12:30:00 PM Forgotten Attachment, immortal song 2, Kim Soo Hee, Son Seung Yeon, Video Comments On the February 28 episode of ' Immortal Song 2 ,' Son Seung Yeon performed Kim Soo Hee 's ' Forgotten Attachment .'... Read More Share: