Ghost Song

Ouh cha la, ouh chah la hé
Ouh cha la, ouh chah la hé
Ouh cha la, ouh chah la hé

Ouh ouh!
I am a ghost song
I am a ghost song
Ouh ouh!
I am a ghost song
I am a ghost song
Ouh ouh!
I am a ghost song
I am a ghost song

Who is it?