Zelda Music == Tchakovsky?

I was sitting here listening to my Sirius radio. That's when I noticed something. I'm listening to Sirius Pops, the classical pops station. The current track is Swan Lake : Dance of the Swan Queen. As I'm listening, this sounds a whole lot like some of the theme music to the Zelda series fo video games on the Nintendo. Have I played so many hours of video games that I'm starting to hallucinate and hear the music in other places, or did the game producer crib the music from Tchaikovsky?