Yes, I agree with Erimgrad, Happy mask salesman has been in both hyrule and terminia (somehow) so it makes sense that the song could be in both. Also, it probly is just something of a cameo. Off topic, but the song of healing is one of my favorite zelda songs

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"Draw thy beak from out my heart, and pull thy form from off my door! Quoth the raven: Nevermore."
"The easiest way to piss someone off is to agree with them from the very beginning."
Lelouch: "whippersnappers these days, with their Dragonforce and their Disturbed, why in MY day we had Iron Maiden!"

Sig and Avi by me