I'm gonna knock you out' Nicki Minaj threatens Mariah Carey

The argument was so bad that production had to be stopped for the day. Nicki Minaj walked off set because Mariah Carey kept making jabs at her. Nicki’s manager and team convinced her to come back to the show. Mariah kept at it and called Nicki a bitch and then proceeded to cuss her out. Producers had to stop filming and call it a night. according to Tmz Nicki Minaj derailed the "American Idol" auditions in Charlotte, North Carolina today, after swearing at Mariah Carey and threatening, "I'm gonna knock you out.but i dont like the fight
Nicki Minaj is said to have threatened Mariah Carey after her American Idol co-star called her a 'b****' - it is now being claimed.
Show bosses cancelled filming in Charlotte, North Carolina for the day on Tuesday after a huge blow up between the pair where Nicki allegedly threatened and swore at Mariah. 
But witnesses insist Hero hitmaker Mariah started it, according to reports.

A source told said that 'Nicki Minaj walked off of set because Mariah Carey kept making jabs at her.  
'Nicki’s manager and team convinced her to come back to the show. Mariah kept at it and called Nicki "a b****" and then proceeded to cuss her out. Producers had to stop filming and call it a night.'
It was previously reported how Nicki fumed she was sick of her co-judge, labelling Mariah her 'f*****g highness'.