Katie Hopkins has left a bad taste in almost everybody's mouth, at one stage or another - she even managed to rile up Holly Willoughby at one stage.
And now the former Apprentice star has angered Kelly Osbourne, who took to Twitter to tell Katie exactly what she thinks about her.
Zoinks!
Katie dryly responded:
Kelly, naturally, made sure she had the last word, saying:
Do you agree with Kelly Osbourne? Have your say on Katie Hopkins in the Comments Box below, stat!