The song comes from “The Birks (Birch) of St. Kilda” which is the name of the melody in an episode of Smallville, which is what Lex Luther attributes the name of the melody. If it is the name, or not, that’s been lost, perhaps, within the past ten years; but there is no record of it on the Internet. The melody is actually, the way I know it, a traditional celtic song, sung in both Ireland and Scotland. “Red is the Rose” and “The Bonny Banks of Loch Lomond”. It’s a particularly beautiful song. I’ll leave a link in the description.
But, in Smallville, the melody plays when Lex Luthor retrieves a key to an Orb that can control Clark, and it gives him a clue—what I haven’t watched the next episode, and am researching this very thing right now.
Personally, it seems a little bit too authentic for it to be a false attribution, so I’m a little curious as to how the show retrieved that particular name. It would be curious, if we could lose something like that over the course of a decade. That’d be very curious indeed.
Or, what’s also probable, it is a touristy area for some ancient ruins, and Smallville’s writers invented the name to get Lex Luthor to that specific Island. And the writers of Smallville were just that good. Which, the show is probably some of the best Television ever produced, so they could coin a word that sounds like it has provenance.
Although, after some research, the island is famous for bells, which were rung to draw ships into safe passage around the archipelago. So, it very well could be an actual song, or the writers of Smallville were just that good. But then again, the Smallville Song is “Birk” which means “Birch Tree”. So, it’s likely the show was getting inventive, and it coined a song that doesn’t exist to a traditional melody. It just sounds so authentic, though.