Rihanna's Sexy Instagram Photo: Singer Poses In Unitard

01/22/2013 03:46 pm ET

The world's most prolific Instagramming celebrity is back at it again. That's right, Rihanna has posted yet another revealing photograph of herself on the social network, this time a black-and-white photograph that shows the singer clad in a pale unitard and staring at the camera from over the shoulder.

"Lights. Camera. Action #alliseeissignz" the 24-year-old "Diamonds" singer wrote Monday.

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