Gallican!  Mozarabic!  Ambrosian!  Sarum!  
Byzantine!  Gregorian!  Everybody Chant!

Like all great chanters in history,
who chanted with all their might,
Ambrose, Hermann, Hilary,
chanting through the night.
They prayed in song and piety,
chanting to get their kicks,
Augustine, Benedict, and Gregory,
chanted 'cause they couldn't have chicks

Let's chant!

If you're going to chant you've got to know your modes!

Ionian, Dorian, Phrygian, Lydian, 
Mixolydian, Aeolian, Locrian, Everybody Chant!!
Let's chant!!