The business mogul spent tonight tweeting the highs and lows of the new ITV1 series, and was rather honest in his opinion of the judges.
He moaned on the social networking website: "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?"
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"
And Louis Walsh also found himself on the end of Lord Sugar's acid tongue.
The Apprentice boss wrote: "Louis Walsh what has he done . His hair has done a Wayne Rooney, his teeth are like piano keys and hid eyes have been done"
However Tulisa was quick to fire back at Lord Sugar through her own account.
The N-Dubz star wrote: "@lord_sugar as someone that came from nothing to something maybe u should have a little more respect for people that have done the same…
"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 1 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"
Tulisa however quickly tried to move on, but still branded Lord Sugar a "t**t" in a follow up tweet.
She said: ""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? X"
We're not sure that very unsubtle change of topic will make this blow over!