I could not find out much about her death, but the global story is that she may have taken an overdose of anti-depression-medication. Her husband was sued by her relatives believing he killed her, but he was acquitted, and the official statement is now she committed suicide. They say she had depression.
And indeed, it's indeed too plastic... She doesn't look natural, and it's not only her breasts I don't like when purely judging her by her looks.