Britney Spears in Concert

Kicking off the second leg of her Circus tour in Madison Square Gardens, Britney packed in the wow-factor by making a statement entrance in a hot air balloon basket in a sparkly sequin bodice.

Britney was on red alert in shiny leggings, showing off her toned midriff with a lacy crop top.

Could she be the sexiest police officer in the world? Britney rocked in her very arresting uniform!

Showgirl: Britney strutted her stuff in a golden cage, surrounded by near-naked men!

Britney jumped through hoops (sorry, we couldn't resist!) to make her Circus tour high-energy and ultra-buzzy.

In a sexy futuristic bodice, Britney looked tour-toned and super-sexy.

Dancing Queen: Flanked by a host of lace-clad male and female back-ups, Britney showed off her fancy footwork in a crystal-embellished bra-top.

Swing out, sister! Britney's tour mixed traditional Circus elements with hot to trot outfits and overtones.

Probably not for the mantelpiece, but Britney still looked cute as she performed inside a giant picture frame.

Is it hot in here? Britney cools herself down with an oversized sparkly fan.

Super-cute in an LWD (Little White Dress), Britney sang her heart out from her purple-cushioned swing seat

Channelling Aladdin-style glamour, Britney glimmered from head-to-toe in her sequin-covered harem-pant ensemble.

Military precision: Britney oozed confidence in her cute khaki army jacket.

As she performed in a monochrome corset and oversized baby-pink feather boa, Britney had a huge grin for her fans.

Another song, another gleaming barely-there outfit! This time, a hot-pink peek-a-boo, fringed number. Cute.