Lily Allen slams Katie Hopkins after she calls her a 'short-a**e' following topless video

Lily Allen attacked Katie Hopkins in a series of angry tweets this week in the wake of her topless Instagram video.

The Sheezus singer took to the social networking site to vent her anger after the former Apprentice star labelled her a 'short-a**e mother in big pants'.

The 39-year-old wrote the harsh remarks, which were later tweeted by a magazine, in her column for The Sun after Lily, 29, posted a clip of herself dancing in Spanx underwear.

Seeing red: Lily Allen, pictured last week, attacked Katie Hopkins in a series of angry tweets this week in the wake of her topless Instagram video

  

Oh Sheezus: The star's first message said what had been written was 'unnecessary'

Lily wrote: '@OK_Magazine @KTHopkins honestly defines unnecessary, as does this article, as does your magazine. Both everything that's wrong with humanity.

'Fat-shaming, woman-hating, moral high ground f***tards. Just stop your pathetic existence, you do nothing... for anyone srlsy', she added.

The mother-of-two launched a further attack on the columnist, relaying an incident in which Katie was photographed naked during a romantic encounter in a field.

Causing trouble: The Sheezus singer took to the site to vent her anger after the former Apprentice star labelled her a 'short-a**e mother in big pants'

Second round: In the clip Lily shimmied around to Drake's Started From The Bottom in her dressing room wearing nothing but a huge pair of pants

Daring: The 39-year-old wrote the remarks, which were tweeted by a magazine, in her column for The Sun after Lily, 29, posted a clip of herself dancing in Spanx underwear (pictured)

She wrote: '@KThopkins tipping off the paps that you'll be f*****g someone in a field = unnecessary, also deluded and self important #begone.'

To which she got a reply: 'But least I didn't film myself doing it and I had someone else to hold my a**e in for me.'

Lily continued: '@KTHopkins sure, I bet those paps were just hanging out in some suburban field and happened to stumble upon your 'romp'.'

Back-and-forth: Lily wrote: '@OK_Magazine @KTHopkins honestly defines unnecessary, as does this article, as does your magazine. Both everything that's wrong with humanity'

Biting back: Katie hit back at Lily after mentioning the incident

'Romp': The star continued to poke fun at the incident

Katie then shared a photo of Lily holding her breasts, with the caption: 'Field or no field, least I have someone to hold my boobs for me @lilyallen PS your kids asked who was in this photo.'

The final message from Lily read: '@KTHopkins stay classy babe.'

It isn't the first time the pair have become involved in a bitter Twitter feud.

They previously battled it out on Twitter after Katie attacked the singer for putting on weight following a miscarriage earlier this year.

The posts came just hours before Lily was spotted leaving London's Chiltern Firehouse looking slim in black leggings and a grey T-Shirt.

Revenge: The mother-of-two, pcitured just hours after the spat, launched a further attack on the columnist, relaying an incident in which Katie was photographed naked during a romantic encounter in a field

The end: The final message from Lily read: '@KTHopkins stay classy babe', which arrived in reply to the above