it really seems to be the major fashion these days with female artists to embrace some sort of cyber / robot theme in their performances and personas now.
here are a couple of stills from the intermission in Rihanna's the Last Girl on Earth Tour. i couldn't embed it so so see it here. you can also download it in a variety of formats with this link here. its a new(?) site i was totally unaware of for downloading youtube videos.
now just how spot on is the robot / mannequinisation fantasy is it? you can try scrubbing through it backwards so that she gets sealed into the glossy black mannequin mask. or maybe she's saving that for her next tour?