Now...if we zoom into Rihanna's see-through top, there's a hickey :-)

On Monday night, Rihanna stepped out bra-less in this retro sheer top which she wore to a Met Gala
 after-party. Now, if we zoom into the photo, there's a hickey on RiRi's left boobs. Someone's been there recently. 
Bad girl. Lol. Continue to see it...