When superstars collide: Beyonce, Madonna, Rihanna, Alicia Keys
Alicia Keys, Nicki Minaj and Beyonce attend the Tidal launch (Photo by Kevin Mazur/Getty Images For Roc Nation)
Rihanna and Nicki Minaj (Getty Images)
Alicia Keys, Nicki Minaj and Beyonce attend the Tidal launch (Photo by Kevin Mazur/Getty Images For Roc Nation)
Rihanna and Nicki Minaj (Getty Images)