Tooth, tooth, where is the tooth?

Elsie is really proud of her first tooth. She likes banging it on spoons and sippy cups every time she eats, and she REALLY likes brushing it (well, chewing on her toothbrush, anyway). The only thing she DOESN'T like is letting us actually look at her tooth. Can you find the tooth in the following series of pictures? It only appears once, and it is camouflaged by a string of drool...