This song could be about anything and it would go No. 1 on almost every chart. Each of these females can deliver a pop hit while also appealing to the hip-hop community. Nicki raps, Beyoncé is married to Jay Z, Rihanna has worked with every prominent rapper, and Lady Gaga and Lana Del Rey have been sampled plenty. If Adele had her voice back, she'd be on this, too. The main question: Is there enough room on the song for all of their egos?