Beyonce Knowles unleashes alter ego Sasha Fierce on unsuspecting fans in the December issue of GQ.

The megastar has gone for poker straight hair and a collection of sizzling outfits in a seven page spread for the German magazine.

Beyonce recently wowed crowds on the Today Show by squeezing her curvacious figure into a tight black leotard to perform Single Ladies.

And it seems the pop star with the split personlity is wiping the floor with comeback queen Britney, after hitting number one in the UK with If I Were A Boy.

See Beyonce in GQ below