Pop princess Britney Spears has shocked the general public once again, flashing her panty-less private parts at a paparazzi photographer after her disappointing performance at MTV Video Music Awards Sunday night.

The singer exposed herself while stepping into a limousine after leaving a Las Vegas hotel, where she partied together with brother Bryan.

It is not the first time the blond star has been caught without underwear. Britney revealed all to a photo reporter, who caught her at a night party with Paris Hilton in November last year.

Spears made the blunder just hours after her long-awaited comeback, which turned out to be a huge disappointment - a lacklustre rendition of her new single Gimme More.

The performance followed a troubled 12 months, during which she was admitted to rehab after shaving her head in public, following the collapse of her second marriage.

Spears put her music career on hold in 2004 when she married Kevin Federline and gave birth to two children.

Last month the pair completed their divorce, but are still facing a battle for custody of their sons, Sean Preston and Jayden James.