Take that, Mariah! American Idol agitator Nicki Minaj has been nominated for four American Music Awards, tying Rihanna for the most nods this year, and beating out Justin Bieber’s three category nominations. For her controversial part, Rihanna will be competing with two exes: Drake, for Artist of the Year; and Chris Brown, for Favorite Soul/R&B Album. Christina Aguilera announced the nominations on Tuesday. The winners, who will be revealed during the Nov. 18 show at the Nokia Theatre in Los Angeles, are chosen by online voting.