The obvious ones are Bey and Rih, Gaga and Katy, etc etc, but there's more. Every artist has one.
For Nicki, it was Kim, then it was Mariah, now I guess it's Iggy. She shouldn't be, because they have nothing in common but because they're the two most successful rap females atm, they're naturally pinned against each other. Same with Katy and Gaga, Rih and Bey.
Rihanna vs Beyonce for obvious reasons
Rihanna vs Lady Gaga for queen of pop title
Rihanna vs Katy Perry are constantly pitted against each other for their ability to top the charts so effortlessly
Britney: Work ethic.
Marina and Foxes: Nobody, although poor Marina. Charli and Foxes opened up for ha tour and are seeing more success than her currently.
Katy:
Iggy: Azealia
She shouldn't be, because they have nothing in common but because they're the two most successful rap females atm, they're naturally pinned against each other. Same with Katy and Gaga, Rih and Bey.
