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”. Nicki is clearly furious, shouting, “I told them, I’m not f*ckin’ putting up with her f*ckin’ highness over there.” Sources say Nicki later threatened to “knock out” Mariah. It all went down while the two were sitting at the judge’s table … with Keith Urban sitting in between them and Randy Jackson sitting on the far end, next to Mariah.