Big pants are back. And Britney Spears is the rocking the look on the Australian leg of her tour.

With the latest trend for underwear as outerwear hitting the high street, the 27-year-old has included big Spanx-style pants and sexy corsets into her Circus tour wardrobe.

She worked a sexy geeky look, wearing large white glasses and a bowler hat with large black pants, fishnets and a black bra.

She then teamed a pink fedora and white sunglasses, with a black PVC bra under a police woman’s shirt. She then wore a black waspie over pants and fishnet tights.

Her new wardrobe also include a corset dress similar to the Bordelle Angela Cage which is flying off the shelves.