It starts like this:
"Do you hear the pipes Cthulhu?And just keeps getting better. Yes, it's the ABBA song "Fernando" redone as "Cthulhu."
They're being played by Shoggoths on the shores of Carcosa.
Can you hear the pipes Cthulhu?
Deep in sunken R'lyeh waiting for the rightness of the stars."
Ia! Ia! Here it is: