Rihanna Slams Beyonce and Katy Perry On Twitter?

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Beyonce told other female singers to "Bow Down' with her newest single, Bow Down/I Been On, and while she didn't say who she was specifically talking about it seems that Rihanna may have taken offense.

Rihanna took to twitter today and posted a news article that showed she beat out Beyonce and Katy Perry as Britain's Most Influential Artist and Rihanna had something to say about that.

I only know how to be number 1!! I could use a challenge... "How dat feel down there on ya knees,… http://instagram.com/p/Xc_hqBBM4V/.

Rihanna has never been known to have any issues with Beyonce or Perry. In fact, Beyonce's husband, Jay-Z, is Rihanna's mentor and the three have been close for years. Same thing goes for Perry; Rihanna and her have shared a close friendship over the years.

Rihanna has even complimented Beyonce on several occasions.

"This pic could single handedly destroy the self esteem of an entire nation http://instagr.am/p/ONtUnbhM3W/," Rihanna tweeted with a picture of Beyonce all glammed up.