Tulisa has called Lord Alan Sugar a 'tw**' after he questioned her X Factor judging abilities on Twitter.
It all kicked off when Lord Sugar started tweeting about last night's X Factor.
Lord Sugar threw the first punch, tweeting: "Can you tell me who the hell this Tulisa bird is on X Factor, she's in the celeb section of The Sun and Mirror every day. What has she done?"
Er, sold over 1.2 million albums with N Dubz alone?
Despite this, he added: "This Tulisa talks nonsense on X Factor, what qualifications does she have to judge singing talent. Please advise where I am missing the point."
Excuse us Lord Sugar, we are sure you know a fair bit about business and that but Tulisa is one of the biggest pop stars in Britain — we think she is more than qualified.
However, Tulisa was quick to speak for herself and tweeted a short sharp reply to her critic.
Tulisa hit back: "As someone that came from nothing to something maybe u should have a little more respect for people that have done the same."
She went on the list her achievements just in case Lord Sugar was still in the dark.
"I have grafted from the age of 11 with my band NDUBZ, we wrote & produced all our music, sold 3 platinum albums, 3 sell out tours, the last being an arena tour & a number one debut solo single! I have worked my bloody ass off!
"So mr lord of judgement - stick to judging on The Apprentice & I'll stick to what I know MUSIC #itsaNOfromme."
Talk about told!
She later wrote to her followers: "Soz bout that tweet peeps. But that t**t has been bad mouthing me since last year! Who watched XF? Some amazing talent this year right?"
However, Sugs was not going to just leave it there and had the last say when he tweeted:"What do you know? That is the point. Don't insult me by comparing my humble beginnings with yours."