Derpy Hooves, the fan-favorite pegasus with crazy eyes, and her clones can be seen briefly several times throughout the episode: in the audience at 01:46, flying around between 02:40 and 05:43, as well as in the crowd around the 20:20 mark.
Ironically, this episode's airdate is during the point in which the Northern Hemisphere is starting winter.
Friendship Report: Twilight learned that everyone has hidden talents, and if they're patient and diligent, they'll find them. Also, she learned that everyone can accomplish anything when they work together and be good friends towards each other.
While the plant and weather teams were led by main characters, the animal team was led by a background pony, despite Fluttershy and Rarity being on the team.
The scarf that Twilight wears at the beginning is the same one Rarity wore in "Dragonshy".