Via Mefi, Once more with Hobbits features songs from middle earth using the music of the Buffy musical episode “Once more with feeling.”
I like “I’ll never tell” as sung by Gimli and Legolas:

LEGOLAS:
He’s short
GIMLI:
He’s pretty
LEGOLAS:
He thinks his jokes are witty
GIMLI:
He hums some elven ditty
As we run along

LEGOLAS:
He’s gross, and hairy
GIMLI:
He acts like he’s a fairy
LEGOLAS:
He’s stubborn and contrary
Stupid and headstrong