Episode 88 of "Sabrina, the teenage witch"
s04e13 Now You See Her, Now You Don't
Title: Now You See Her, Now You Don't
Original Air Date: 01/07/2000 on ABC
Plot Outline:
Determined to win Cutest Couple at the prom, Sabrina gets a dynamite dress that is a size tto small, becomes convinced she must lose a ton, and diets so much (with the "help" of an unscrupulous Other Realm salesman) that she disappears altogether.
