Byul - I Think I Love You (Byul - I Think I Love You) Un Myung - Why (Un Myung - Why) Song Hye Kyo - Geu Deh Ji Geum (Song Hye Kyo - Geu Deh Ji Geum) Song Hye Kyo - Sha la la (Song Hye Kyo - Sha la la) Why - Forever (Lee Kyung Sup - 이경섭) Lee Kyung Sup - Instrumental (Why - 와이)