[quote=@Sadu]
[@mattmanganon]

I'll probably use that, but edit it slightly. The direction I think it should go, is that magic born of music is the purest magic imaginable (But not necessarily the most powerful). But, music from the heart, creates magic in the alignment of that heart. Music sang from malice, from a dark heart, would create magic of the purest darkness, while magic from a heart of light, would create magic of the purest light. 

This gives weight to villains having their own musical numbers, and why, for example, in Anastasia, Rasputin does his most powerful magic while singing, it's because his music from a heart of darkness, creates magic of pure darkness.

Also the idea that it binds hearts of likeness together... which is why many villain songs seem to rally followers (Be Prepared, Savages, The Mob Song). The idea is that when sung from the heart, a song can resonate with that same part of people's hearts. Everyone has darkness and light in them, so when a villain sings a song, it resonates with the darkness in people's hearts, allowing villains like Gaston or Ratcliffe to rally people to do their bidding, when in all fairness, they are just normal people being manipulated to do something bad.

Not that you specifically said music from the heart was purely light, but I want to make the distinction. 

Maybe Morgan will get her own song at some point... if I ever found one I liked... that's probably be dark, or depressing, or both.
[/quote]

I officially declare this canon. It works with the whole idea of the villains gaining the power to alter the reality of their stories to make them the protagonists.