She's not exactly been shy about taking chunks out of certain celebrities.
And it seems that Lily Allen is the latest star to take offence to the controversial comments of Katie Hopkins - sharing her feelings in a Twitter rant.
The former Apprentice star criticised Lily for gaining weight while she was pregnant in a recent interview with Heat Magazine, saying:
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"I quite liked her when she was singing and kind of interesting and then she went off to tell us all about being a mother.
"She was removing herself from the spotlight because she wanted to be a mother and that largely involved gaining two stone and looking pretty hideous."
Katie added: "So then she decided that was boring and now she wasn't going to be a mother any more, she was going to be a singer.
"Like Peaches (Geldof), she is just famous for having a famous dad."
The singer, who had recently re-launched her music career, took to the social networking site to hit back at Katie, before deleting them all.
She wrote: "‘Katie Hopkins: I am not famous for having a famous dad, I doubt that most of my fan base have a clue who my father is."
Lily then decided to responded to the comments directed at her weight, bringing up her late-term miscarriage.
She added: "Yes, after tragically losing a child so late into my pregnancy I may have gained a few pounds. I am one of many that find comfort in food.
"The two pregnancies that followed were terrifying because of what had happened before and I was pretty much on bed rest for 20 months."
Lily, who's admitted to struggling with her body-image in the past, continued to blast Katie for the weight jibes.
She added: "I wasn't exercising because I didn't want to take any risks, and, funnily enough, the survival of my children felt more important than being thin.
"Can somebody tell me what Katie Hopkins does except go on telly slagging off girls half her age?
"PS: Katie, looks are obviously so important to you. There's always plastic surgery ya know. Maybe they could sew your mouth up while they fix the rest of you."
"Oh, and whilst ‘weighing me up’, fat shaming, you were a stone out, I gained 3 not 2. And hey, look I’m on the cover of Elle this month!"
After her MAJOR rant, Lily thought better of the public take-down and promptly deleted the posts. Awks.
She followed it up with: "Sorry about that, but my babies are a touchy subject and I gave her exactly what she wanted by responding. I am now going to delete it all."