This is an odd one in that it mostly isn't meant to be funny. Only the last verse contains a joke, and a feeble one at that.
CIELITO LINDO As sung by Homer & Jethro.
1. In Mexico, 'neath the mountains' glow, To the plains below comes a maiden. What a prize, with her laughing eyes And her tender sighs, romance laden.
CHORUS: Ay-ay-ay-ay, beautiful heaven. Your golden voice makes my heart rejoice And if I'm your choice, that means heaven.
2. An arrow flies through the angry skies While two roguish eyes are a-gleamin'. Cupid's dart now has pierced my heart, And when we're apart, I keep dreamin'. CHORUS
3. She left Mexico to go with a show With Homer an' Jethro an' Pedro. She didn't know that there'd be no show. She wound up singin' a solo. CHORUS TWICE.