In the song as Twilight is ending her verse and the crowd sings around her, the split in Twilight's bangs is on the same side as the stripes, when it should be opposite the stripes.
Rarity is already missing both of her slippers before she drops one of them on the staircase.
Sometimes, the top of Rainbow's mane is the same as her everyday style instead of the smooth style she wears it for the gala.
When Twilight enters the gala, a Wonderbolt near the center of the screen has pink blobs covering her eyes.
Twice in a row, when the camera zooms in on the Mane Six at the end of "At the Gala", Rarity's shawl and slippers are missing.