Could you post what you have so far? It's really just as simple as having something like this-

if(health <= 0 && !dead)
{
    dead = true;
    animation.Play("FATALTIY");
}

Unless there's something you haven't told us that makes it more complicated?

I'm so sorry. I was just coming to close this question. I actually placed the animation call into awake instead of update and it didn't work -_-* Thanks for answering tho! :)

Well, that would certainly explain why it didn't work!