Rihanna Show’s Her ASS on Instagram! (Explicit Photos)  So you know our girl Rihanna be wylin on her instagram but this time she let it all hang out. Her ass that is. Apparently she has cut the butt portion out of her jean shorts to expose her thong an butt cheeks. This chick be wylin but I love her. Click the link to see the photo Chris Brown Breaks Up With Rihanna? Drake Goes HAM on Rihanna and Chris? Rihanna’s Dad Wants Chris Back?