Pinkamena Diane Pie?

I just don't know what went wrong, i don't feel it's good enough, if someone know how to fix that weird face please tell me.
Simplemente no se que salio mal, no siento que sea lo suficientemente bueno, si alguien sabe como arreglar esa extraña cara por favor digamelo.

The other Yay!:
Fluttershy: [link]
Rainbow Dash: [link]
Twilight Sparkle: [link]
Rarity: [link]
Pinkie Pie: [link]
AppleJack: [link]
Cadance: [link]
Pinkamena Diane Pie: [link]
Derpy Hooves: [link]