In the movie crossroads, in the scene while Britney, (Lucy) and her two friends are in the bathroom and the just figure out that their driver may be a killer, they show a back view of Mimi's head. She has a toothbrush in one of her pig-tails. Then the camera moves to Britney. In another shot thats back to the back on Mimi's head the toothbrush is gone. Then in the next shot of Mimi's head, the toothbrush is back. She wasn't even brushing her teeth at the time when it was gone.