Photo Finish's appearance and character is based on the iconic editor-in-chief of Vogue magazine, Anna Wintour.
Ashleigh Ball has already recorded her lines as Applejack and Rainbow Dash, who are going to give Twilight advice on how to save Fluttershy from Photo Finish by embarrassing the fashion show's audience. But all of her lines are cut due to time limits.
The "green" in the episode title likely refers to Rarity's jealously of Fluttershy. Feelings of jealousy are commonly associated with the color green.
Derpy Hooves, the fan-favorite pegasus with crazy eyes, can be seen briefly in the audience at 10:00, and her clones are visible at 10:25 and several times in the audience between 16:00 and 18:40.
Pinkie's "Pinkie Promise", which goes, "Cross my heart and hope to fly, stick a cupcake in my eye," is a parody of an old oath that goes, "Cross my heart and hope to die, stick a needle in my eye."