Nicki Minaj Using Cuss Words and Threatens Mariah Carey During 'American Idol' Audition

Nicki's rant on the "American Idol" set went beyond mere name-calling Tuesday ... the rapper also threatened Mariah's life, saying, "If I had a gun, I would shoot her."

Nicki Minaj--'Mariah Carey Called Me a Bitch"

Mariah Carey fired the first shots in her "American Idol" war with Nicki Minaj ... calling the rapper a "bitch" multiple times ... this according to sources close to Minaj.