Rihanna Responds to Beyonce's "Bow Down/ I Been On"?

Rihanna Recently was named the most influential Pop Star in Britain. She beat out tough competitors such as Beyonce and Katy Perry. 

Yesterday afternoon Rihanna tweets the picture above and has theis as the caption!

I only know how to be number 1!! I could use a challenge… “How dat feel down there on ya knees, Huh?!” #gunzindamuthaphuckinair #allmyniggazNavi #controlyourheauxz #heauxzBeAckinUp #yesimeantAckin #catchup #phuckyouandyourtimedifference #walkupindisbitchlikeiownaheaux #fromtheleftsideofanisland #tu

Is she referring to Beyonce??