I've been browsing through tons of Diana websites lately, and I found a really, really good one.
http://www.glitznglamour.com/diana/ is a great website, featuring information, places where Diana will be appearing and- my favorite part- photos. This website has hundreds, possibly thousands of Diana pictures. There are pictures from almost all of Diana's performances on American Idol, as well as one or two from one of her first singing competitions- America's Most Talented Kid. There are also posed photos, most of which can be found in thr Headshots category.
So, I sincerly hope that you check out this website for everything Diana related!