Britney Spears is reportedly set to greet crowds at Madonna's upcoming Sticky & Sweet tour with her "It's Britney, bitch!" catchphrase - while prowling around an elevator like a caged beast.

Following one false start, Spears has filmed her movie segment at a studio lot in West Hollywood and now details of the short film are leaking out.

Spears, wearing a grey hooded sweatshirt, paces back and forth in an elevator as cameras catch her kicking and punching the walls.

As Madonna fans ask themselves who the angry hooded woman is, Spears pulls her hood down and delivers her catchphrase into the camera.

Madonna's Sticky & Sweet tour, which will feature the Britney mini-movie, kicks off on 4 October in East Rutherford, New Jersey.