Is Candice actually dead? Or did I just miss something?

I believe that she might be coming back, after all she still has her head attached and most probably her brain, but she would need someone to bring her back from the death... If she is dead...

I think that they are in an illusion created by her...to show sylar what would happen, and that he doesnt have powers.

However she turned fat when she hit the floor....which would lead to her being really dead. HOWEVER her clothes and hair should have changed

Candice is definetly dead