What is the name of the camera that prints out a picture as soon as you take the picture?

it's DEFINITELY not popular anymore lol. its not digital. um.... if you watch hilary duff's music video, yesterday (http://www.youtube.com/watch?v=lt6PVVr4B04), she's take pictures with the camera i'm talking about? what is it called, and do you know where i can buy it? is it anywhere around manhattan or any other place in new york city? thank you <3