Because awesome, thats why. The only thing I dont like to much about it is that it seems slightly cluttered. Also, One of those shades of purple is not actually twilight's. I had to make a custom shade of purple for the tribal background so that it wouldnt blend it, which it still kind of does.
Twilight Sparkle, My Little Pony: Friendship is Magic, and all characters in MLP:FiM (C) Hasbro. If I missed anything, please dont sue me.