She tells Glamour magazine, "There's a pack. It's me, (Lady) Gaga, Katy Perry, Beyonce... who else? Ke$ha for sure.
"Women are definitely dominating music right now, and that's because we are competitive beings. I feel like music hasn't been this exciting in a while."
And Rihanna is particularly enamoured with I Kissed A Girl hitmaker Perry.
She says, "All my friends are guys, to be completely honest. But when I met her, it was such a breath of fresh air. I just couldn't believe this chick had no edit button... Katy and Lady Gaga came out of the gate exactly the way they think, the way they wanna dress, the way they wanna speak."