Semi-canon tumblr blog here.

Pinkamena Diane Pie is a mare suffering from terrible dreams and shattered hopes, lost in a numbness she can't get away from. Surprise is an other-worldly outcast who finds herself turned into a musical sensation, but lost in a deep grief she cannot comprehend. They will both suffer the life of an artist in an emotionless Canterlot- apart at first and then together.

Inspired by the Marilyn Manson concept album Mechanical Animals. It is awesome and you should go listen to it right now.