Lee Seung Gi - 되돌리다 (Return) (With LYn)
Lee Seung Gi - 내 여자라니까 (Because You're My Woman) (With Cha Eun Woo)
Lee Seung Gi - 삭제 (Delete) (With ISU)
Lee Seung Gi - 하기 힘든 말 (Difficult Words to Tell You) (With Captain Planet)
Lee Seung Gi - 아직 못다한 이야기 (Unfinished Story) (With Lee Mujin)
Lee Seung Gi - 비상 (Desire to fly)
Lee Seung Gi - 수고했어요, 우리 (Well done, guys!) (OST Bro & Marble Part.5)
Lee Seung Gi - 친구잖아 (Because we're friends)
Lee Seung Gi - Tonight
Lee Seung Gi - 어디라도 (Anywhere)
