The 'X Factor' judge - famed for sending her foes stinky mail - has penned an open letter to daughter Kelly, in which she slams Katie for what she said to her daughter in a Twitter row on Thursday.
Sharon Osbourne and Katie Hopkins
Kelly and Katie came to blows on the social networking site after she caught wind of something Katie said about Sharon's plastic surgery last year.
After Katie then suggested Sharon was only famous because of her parents, Sharon was forced to speak out via Facebook.
Sharon and daughter Kelly
And her response is amazing - cop a load of this:
My Darling Kel,
Katie Hopkins is a person with zero credibility. She has no respect for others and contributes nothing to society. Her comments and opinions about us are of no importance. She is an embarrassment to all women and our country.
I had to search on the internet to find out who she even is!
P.S. Kelly you really are my mini me, I love you so much!
And this is exactly why we love YOU, Mrs O!