Lord save us from Christmas music. You can't even escape it in Japan.
Saint Nicholas' Unholy Hymn (Level 2)
Range: 120 yards
Area of Effect: Special
Components: V, S
Casting Time: 1
Saving Throw: Neg.
When a wizard casts Saint Nicholas' Unholy Hymn, he causes a hideous uncontrollable urge to sing to come over his victim. Once taken by this urge the creature affected can do nothing else other than bellow a cacophonous dirge; he cannot fight, eat, sleep, or walk, though he does remain standing. The spell affects 2d4 hit dice of monsters; monsters with 4 or more hit dice are unaffected, and targets must be within 30 feet of each other. Creatures with an intelligence of 16 or more are permitted a saving throw.
Singing creatures can be attacked as if prone. They continue singing until they are wounded, or shaken and slapped repeatedly - they will eventually starve or die of exhaustion unless this occurs. Material components are a sprig of holly and a small silver bell.