While Rihanna was out in Miami and Atlanta making various appearances at high-end strip clubs, Katy Perry was in LA partying on her own.  She sent out a playful tweet to Rihanna stating that she was "offended" that she didn't get an invite to come hang out with her friend, but then followed that tweet up with a few flirtatious ones.  

Now it's public knowledge that Katy Perry and Rihanna are close friends, and have actually displayed PDA in the past.  Aside from friendly hugging or kisses on the cheek, Katy Perry playfully spanked Rihanna's bottom numerous times at last year's VMAs, and Rihanna responded by grabbing Katy's bottom while they hugged each other.  Now that she sent out a few flirtatious tweets about letting Rihanna "make it up to her" at the Barclays Center, you can only wonder what kind of interactions might take place between the two young beauties. 

Check out the tweets above.

Source: globalgrind.com