My App Store disappeared, how do I get t back?

About a week ago my App Store on my month-old iPhone 4 was no longer on my home page. I mostly have music and pictures on my phone, no apps really and no games, so I don't use it that much. Anyway it's not on my screen, I've searched it on my iPhone I cannot find it anywhere. Could it have been deleted somehow? Where did it go? How can I get it back?