July 27 | There are dueling sides to Nicki Minaj: one is a formidable spitter whose verse on "Monster" bested those from Jay-Z and Rick Ross, the other is a fembot Barbie pop star. Her latest release Pink Friday: Roman Reloaded explores both personas, with the first half featuring her refreshingly weird raps reminiscent of her mixtapes, the other a collection of club-ready songs. 2 Chainz opens. At UNO Lakefront Arena. PAGE 38.