Steve Buscemi singing Irish songs, including mouth music. The only thing I can figure is that the priest who sings "The Well Below The Valley" at the opening of
The Magdalene Sisters bears a slight resemblance to Steve Buscemi.
Ah, yes, now I remember. The "You are not a man of god!" scene from that movie floated into my consciousness last night. That must be the connection.
Also, while I loove "The Well Below The Valley", seeing it sung by a priest at a wedding? Totally creepy.