For iTunes: itunes.apple.com
In my opinion, Facetune is one of the funnest editing apps available. If you've ever wanted to change your appearance, give this app a try. With this app, you can easily edit things like blemishes and laugh lines. You can use it to make your teeth appear whiter and to hide dark circles under your eyes. You can even use Facetune to change the shape of your eyes or lips.