The effects of Bulimia on Marley. She spends her first five episodes looking warm and bright and cheerful, but once Kitty gets in her head and makes her start vomiting all her meals up she gets less energetic, more pale, and more frail. It all comes to a climax during the Gangnam Style performance. the music starts to cut out near the end, the camera is at weird angles, parts of the song speed up or slow down, and at the end Marley is so malnourished that she collapses onstage. The worst part is the insight to the skewed priorities she's developed, and how such a simple line can become really disturbing.
Marley: I'm so hungry. But at least I fit into my dress.