it looks like shes singing either the moon rises or let it go or somthing like that.
Princess Luna (BEST PRINCESS)
Princess Luna More
[MLP]LUNA of moe anthropomorphism by SakuranoRuu.deviantart.com on @deviantART
Luna just being best princess
MLP Luna | My Little Pony Friendship is Magic Luna's point of view~
Cute Luna | Princess Luna Gala Dress | My Little Pony: Friendship is Magic | Know ...
Neon Princess Luna by ~ZantyARZ on deviantART
Princess Luna by corrico.deviantart.com on @deviantART... I LOVE Princess Luna and I hope you do to, or I'll send Pinkie Pie after you!!!!!! Jk... maybe... :)