The formula can get a little goopy, so I suggest leaving some extra time between coats. I think this was four coats, although it could have been three--I can't remember! :-/
I used to wear this polish religiously when my stash was still quite small, so it was fun to bust it out again and remember how and why I love it so much. I always meant to get around to buying a back-up and now that the prices for it are higher, I really regret not doing so. It's such a cute, fun glitter and if you can get your hands on it for a reasonable price, I highly recommend adding Teenage Dream to your collection!