24 Celebrities who really hate each other (With Pictures)

11. Mariah Carey Vs. Nicki Minaj

Mariah Carey just loves her celebrity feuds. She and Nicki Minaj go back to American Idol, back when they were both judges. They actually collaborated on a track back in 2010, and they seemed to be okay with each other then, but things went south fast once they got on the show together. Things deteriorated, though: it only took about two weeks for things to get dicey on the American Idol set. Even Barbara Walters got involved!