OK, I get the connection to descending melodic minor, but since that chord progression defines a new section, and sounds like a key change, and the chord progression itself, if isolated, would clearly define G Major, why not just say that the chorus modulates thus? Upon listening to the song I found the intro tricky, and A melodic minor was an astute observation, as the intro theme does have a minor sound. The verse, however, even tho the chords in the first line are entirely minor, has a much more Major sound, altho somewhat ambiguously, but this is just what you would expect if the b6 is present. Other than Am all the chords seem to point to analysis of either E Major or (the relative) C# minor as the key for the verses, and describing the Am chord as being borrowed from the melodic minor. I would tend to lean toward E myself, since the verses conclude with the E chord, but it's certainly not a strong cadence, and I note that no version of a B chord is present, as might be expected. You could also say that it kind of floats between A melodic minor and E (or C# minor), but I think this is unnecessarily complicated, given the simplicity of the theme. With that in mind, it seems hard to justify analyzing the chorus as being based on descending A melodic minor when there's a simpler alternative. I would add that the chorus theme is mostly ascending, which would seem to demand the presence of G#, which doesn't occur until the end of the section with the reappearance of E Major, which brings us back to the verse. I'm hope I'm not being argumentative (well, not TOOOOO much...). ;) It's just that it's an interesting question, and I'm trying to work thru the reasoning... Andrew