Britney Spears Britney Spears Britney Spears' nipples are not the most obedient of subjects.

So it's hardly surprisingly they've gone on the rampage.

Ruthlessly taking advantage of the fact that Brit and bras are not exactly the best of mates, they've jumped to attention on the set of the singer's latest video single, Radar, in Los Angeles.

Going by Britter's face, she's far from amused by her chest peanuts' saucy act of rebellion.

But she really can't be that taken back; it's not like it hasn't happened a gazillion times before.

Nor does the star make any effort to reign her blouse bunnies in, on the back of each consecutive boob incident.

See Britney's perky nipple display for yourself, in our X-rated gallery below.