Here is yet another photo of Rihanna grabbing her a** on stage.
This time she was in Vegas at the Borgata Hotel Casino & Spa's MIXX with Cee-lo. She's been doing this at every show since a photographer first caught it last month and the pic got picked up all over the place.
In case you didn't know: this is what an attention whore looks like. SMH.
More flicks from the show below.