Beyonce & Rihanna new song? LISTEN!!!

Could this be a sound bite of a new song by Beyonce and Rihanna?  This was leaked on the internet and the internet is going into overload at this very moment.  Beyonce and Rihanna are the biggest selling female artist ever.  To be on the same song would be epic!  Listen to this sound bite and tell me what you think?  Could this be the "unicorn" single by Beyonce and Rihanna?!  WOW!