Toot your own horn

Twilight starts hearing strange noises from out of nowhere.

Twilight's got a pretty good life going in Ponyville. Her days are full of friendship, studying, and the studying of friendship. On top of that, she's a princess in a fancy crystal castle in Ponyville. Her life is as close to perfect as she can imagine it...

Except for that weird noise that has suddenly started keeping her up at night.