Britney Spears Shares Las Vegas Rehearsal Video

Britney Spearshas released a teaser video for her forthcoming Las Vegas residency, showing herself working on a dance routine.

The 32-year-old pop star is seen rehearsing with choreographer Antony Ginandjar in the YouTube clip, learning new moves for her 2004 hit Toxic.

She says: "This year I have new choreographers and they're new, upcoming and fresh guys, so their stuff is really hard. It's more rewarding when you perform something that is really hard to do."

And Ginandjar praises her commitment and abilities, saying: "The way she retains choreography and picks up choreography is really fast.

"It's quite amazing how much material she's actually learning in such a short amount of time."

Britters has signed up for a two-year residency at Planet Hollywood in Vegas starting next Friday - and she will play 50 shows in each year of her contract.

Directed by Baz Halpin, the show will feature 21 of her hits - along with tracks from her new album Britney Jean.