Celebrate high times - come on!
We're guessing Rihanna is enjoying her Labor Day weekend if these videos are any indication!
In fact - she's having a ganja old time, ha!
Watch Rihanna getting her party on down
But what in the world would push Kylie to call her loving big sis a "fake b*tch"?
We're sure she was just messing around, Kylie! LOLz!