The wife of Nick Cannon, sources say, "is genuinely afraid" after the Super Bad singer went off on her during the show's auditions in North Carolina, when she declared, "I'm not f***ing putting up with her highness over there - figure it the f*** out, figure it out."
While Carey blew off the rumors - saying, "A feud takes a little longer than two days!" - an insider says Mariah "is genuinely afraid" and irritated by Nicki's antics, and probably wouldn't have even signed onto the Fox program if she knew she wouldn't be the only woman on the panel.
In addition, Nicki's late arrivals have grated on Carey's nerves, a source told US magazine, adding "Mariah thinks it's rude and holds up production."
Still, in spite of the dueling divas, show officials are tickled pink over the buzz they hope to garner from the toxic mix.
"They're thrilled with Nicki," an insider says. "The execs love the drama … they feel like they've struck gold."
Divas Dark Fight! Mariah Carey Confirms That Nicki Minaj Threatened To Shoot Her