Music Awards for Trot Music of the Year.She sang the song "S.E.O.U.L." with Super Junior 's Kyuhyun , Ryeowook , Sungmin and Donghae and fellow Girls' Generation members Taeyeon , Jessica, Sooyoung and Sunny . Super Junior's Siwon , Leeteuk , Shindong also appeared in the music video uploaded in SM entertainment's