Xtina gets Dirrty in Burlesque

Saucy moves ... Christina Aguilera

CHRISTINA AGUILERA impresses CHER with her provocative moves in a scene from her new movie Burlesque. 

And the sexy star introduces the clip with a special message for Sun readers.

The Dirrty singer plays a small-town girl who travels to LA to pursue dreams of stardom.
After landing a job as a cocktail waitress in the Burlesque Lounge, where Cher is the legendary headliner, the enthralled Ali vows to make her way from bar to stage.
Our exclusive clip shows the moment she attempts to impress her mentor with a saucy routine to the title track.
Burlesque is released on December 17.