It appeared that the Nicki Minaj - Mariah Carey feud was "definitely not fake" on tonight's premiere of American Idol. The two divas picked at each other from anything from Nicki's British accent to Mariah's beauty lighting to even the cast of Mean Girls, which was rather perfect for the occasion. In the words of Ms. Minaj, "Rrrreowww." And per the preview for tomorrow's Chicago show, the cat fight certainly hasn't been laid to rest. Watch the best moments of tonight's feud straight ahead.