Cat was in a box for this episode so Ariana Grande could perform at an awards show.
Cat only appears for a few minutes before being locked in Dice's magic box.
When inside the box, Ariana Grande actually did the banging on the door.
While in the box, Cat sings the song "Beautiful Dreamer", but uses the words "tube socks" instead of "rude world."
The Cyrillic text on the box roughly translates to "disappearing box."