Sweetie Belle has discovered that there is a powerful magic in her singing voice. This magic that allows her to touch the minds of other ponies and pass judgment on those who cross her. With great power comes great responsibility, and Sweetie Belle does not posses the necessary responsibility. And so, with every song she sings, misfortune befalls another pony. Sweetie Belle does her best to rationalize it as justice or karma, but in reality, this power that grows with every song she sings is slowly driving her insane.
Each chapter has a featured song. After all, this is a musical. You can even suggest songs for this story. But beware, for these songs you choose will determine the fate of Sweetie Belle and those around her.

Discord is forced to write a friendship report to Celestia. It ends about as well as you'd expect.

Thanks to my editors SolidFire and Xl9 and prereader Skeeter The Lurker for all their help!

Awesome art from the greatly talented Mickeymonster.