PICTURE EXCLUSIVE: Gun-toting Rihanna leaves very little to the imagination as she goes braless and wears a thong under sheer robe during filming for her new music video at Miami mansion

She's working hard on her 72-date world tour.

But during her stop in Miami this week, Rihanna found time to fit in a shoot for the music video for her second single from new album ANTI.

The star chose one of her raciest looks yet as she shot scenes at a plush mansion on Wednesday, going nearly nude under a sheer robe and brandishing a gun.

The star ditched her bra and wore just a blue thong under the delicate cover-up.

She added some statement accessories, rocking a white choker, but swapped heels for comfy slippers as she waited for the shot to be set up.

Her most notable accessory though was a large handgun which she held up in the air as the cameras rolled.  

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