Disney songs tend to be so exuberant (or at least melodramatic)...offhand I'll go with this for my Libra sun & stellium that's Plutonian in nature sextile with my Sag stellium:
http://www.youtube.com/watch?v=Mx1MmY1Bb50 And yet not quite enough to capture my Sag stellium (moon, Mars, Uranus, Neptune) so I'll have to throw this in:
http://www.youtube.com/watch?v=gA9nZrhFo4U
Again, more capturing the energy in my childhood. I guess the duet Defying Gravity might catch it (both Sag and Libra within me with a dash of Scorpio and Leo) but it's not (yet) owned by Disney (but probably will be one day ).
I don't supposed there's an X-Files musical I missed...I bet Moulder and Scully singing to each other could come very close to the psychic forces within me that fight as often complement each other.