And then some.
The pair had a heeeeeuuuuuge diva-off as they filmed auditions for the new series of the hit US show in North Carolina and luckily for us, someone managed to capture it all on film and gave it to TMZ.
OK, so we can't quite make out exactly what they're screaming at each other but it doesn't take Judge Judy to work out that these two aren't blowing smoke up each other's surgically-enhanced bottoms.
According to sources, Nicki became enraged with Mariah - who she refers to as 'her f**kin' highness' on the recording - after they disagreed on a contestant's performance and then allegedly threatened to 'knock her out'.
We cannot WAIT for the live shows.
Click the video above to see Nicki kick off with Mariah.