I might remember it incorrectly, but I thought the following episode showed her in the morgue regrowing herself back.

In another episode, she jumped out of a very tall structure to prove to her best friend that she was indestructible. She looked gross after the second "death".

Those are the scenes about her invincibility which I remember.

two minutes later:

You may be right about her being dead at another time. Now I can't get rid of the image of her torso being ripped open...and it's dinner time...