actually... oh man, brilliant idea. using a somewhat simplified version of this:
www.youtube.com/watch?v=PD83dqSfC0Y where instead of a (filming) camera on the back of the coat, you've got a (photography) camera on like your shoulder or something, with a button hidden somewhere, you can have the camera take a picture, then display that picture on the front of the shirt! then Gavin could have actually had a shirt with her mom on it!