It’s a holiday musical in an episode that aired one year ago today.
“A Hearth’s Warming Tail” is the 8th episode of the 6th season of the animated series, My Little Pony: Friendship is Magic. Written by Michael Vogel, it first aired on May 14th, 2016 on Discovery Family.
In the episode, it’s holiday season in Ponyville, but the reformed Starlight Glimmer isn’t sure where she fits in to the celebrations. So, Twilight Sparkle reads her a holiday story that channels the spirit of A Christmas Carol.
The episode is a musical with multiple songs, including the first song featuring Princess Luna, performed by Aloma Steele.