Lisa vs. Malibu Stacy - S5-E14
Corrected entry: When Lisa is having her little town meeting awaiting the spoken words from Malibu Stacy she has all of her other dolls in front of her sitting in little chairs facing a little podium. However when Lisa is venting having heard the moronic slogans Malibu Stacy speaks when her string is pulled there is a close up on Lisa and then the next shot is a wider one of the room and it shows Lisa still holding Malibu Stacy but all of her dolls and furniture are gone. During the entire scene Lisa has her entire focus on the Malibu Stacy problem and is not seen moving about the room at all.
Correction: If you watch carefully, you'll see that Lisa is on one side of a divider and the dolls are on the other side. When the scene pulls out to the wider shot, we see Lisa holding Malibu Stacy (just before the wide shot, we see her pull the doll over the divider). Her other dolls are gone, but they're supposed to be. They are on the other side of the divider (the side closer to the window, as established in the first shot of the doll convention, when we see the living room BEHIND Lisa).