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On Thursday evening Rihanna stopped by Best Buy in New York City wearing a super sexy outfit, but she wasn't there for a meet and greet with fans ... instead, we snapped the R&B superstar strutting through the store with the Razer Naga Gaming Mouse!

RiRi was joined by her little brother RJ, and she tweeted, "Spent the day with my favorite guy!!!! @rjfenty96 #bestdayever #mylilbroizbigazphuck #whyheposelikehechucknorris..."

We're guessing the mouse could be for her younger sibling, but last time we checked, her on-again/off-again boyfriend Chris Brown was an avid gamer too, so maybe she's trying to extend the olive branch with the $75 toy?