Demi Lovato & Kathy Griffin's Twitter Feud Was So Friggin' Serious That Cops & Death Threats Were Involved!
In fact, she used Twitter to say Demi was the "biggest douche celebrity" she had ever met.
Needless to say, the 21-year-old talent's loyal Lovatics weren't very happy with Kathy's unkind words!
Unfortunately, they took their dissatisfaction with the comedienne way, way too far and sent her death threats!
Kathy did a recent interview with Howard Stern and explained the whole thing. She read one of the horrific tweets directed her way — it said: