Twilight Sparkle just loves the new dress Rarity gave her for her birthday. So much so, in fact, that she's got to get her groove-thing on. Naturally, this leads to horrifying consequences.
Sequel to "Bride of Discord." Discord and Fluttershy are blessed with a daughter named Screwball, who is gifted with incredible power that attracts the attention of the Queen of the Changelings...as well as her son.
Mothball searches for the perfect gift for Screwball, while Prism fears her parents Rainbow and Soarin won't make it home for the holidays and Discord accidentally tells a filly there is no such thing as Santa Hooves.