How come my makeup looks weird in pictures?

I noticed that after my makeup is all blended and everything that if I try to take a picture of myself on my ipod touch that my face looks all discolored and oily and gross even though I just put on makeup to prevent that from happening. Why does my makeup look weird in pictures or when I try to take pictures and how can I fix it? Is there any sort of tinted moisturizer that can be used specially for pictures but can be used for everyday use and is also cruelty-free? I just need something that I can use everyday but works great for pictures and is lightweight and cruelty-free. Thanks!:)