While you count down the last few hours of your work week, enjoy this Instagram video of Rihanna putting in a different kind of work—she's seat-dancing (seat-twerking?) on a boat in a Chanel bathing suit. 

When her camera-toting friend doesn't tell Rihanna she's filming, we get a rare sneak peek at Robyn Fenty, the real girl behind Rihanna. And what we learn is that Robyn also likes champagne.