Nicki Minaj and Mariah Carey in Idol bust-up

Nicki Minaj and Mariah Carey were involved in a huge bust-up while filming American Idol on Tuesday (02Oct12), reportedly forcing producers to cut auditions short.

The two divas, the latest superstar mentors hired for the hit talent contest, apparently fell out over a contestant who tried out for the panel in Charlotte, North Carolina.

In video footage obtained by TMZ.com, a furious Nicki Minaj can be seen shouting and swearing at the Hero hitmaker, telling producers, "I told them, I'm not f**kin' putting up with her f**kin' highness over there."

Mariah Carey can be seen beginning to argue back while Keith Urban, who was sitting between the warring pair, tries to calm the situation.

The show's bosses decided to cut the tension by closing the auditions for the day, according to TMZ.com.