According to sources close to Minaj, Mariah Carey fired the first shots in her "American Idol" war with Nicki Minaj calling Minaj a "bitch" many times.

Nicki is reportedly adamant ... Mariah repeatedly berated her until Minaj finally had enough and exploded.

According to reports, Nicki feels Mariah has been wasting everyone's time by constantly praising herself instead of focusing her energy on criticizing the contestants.

A source claims: "She keeps bringing up how many records she's sold, name dropping people she's worked with, how many tours she's done, and how many Grammys or awards she's won ... Nicki is tired of it."

If this is actually true, we are tired too of Mariah or anybody else boasting about their "legendary career"! What about you?

Feel free to comment and share this blog post if you find it interesting!