Britney Spears has performed a raunchy routine for a secret live trial of tracks from her as-yet untitled album.
The singer's dancers tore her top off to reveal a tight bikini at a surprise gig at the Palms Hotel in Las Vegas.
Opening with one of her new tracks, Me Against The Music, the audience were amazed at the new-look Britney as she started her set by writhing on a man, says The Sun.
She then went into the second number from her next record, called Breathe On Me, as her dancers peeled off her T-shirt.
She finished the show surrounded by her group with a medley of favourites I'm A Slave 4 U and Baby One More Time.
Britney is said to have flown to Las Vegas from California, where she had been hoping to see Jennifer Lopez and Ben Affleck tie the knot.