Ok! Exclusive Britney Preparing For Next Video!

OK! has learned that Britney Spears and her team of choreographers are in the final stages of preparation to shoot the video for her single "Piece of Me."

"She's picked the dancers, who are meeting with the choreographers Wednesday night to rehearse," a source close to the shoot reveals exclusively to OK!. And part of getting everything ready for Friday's shoot at an as-yet-undisclosed location is preparing for the worst-case scenario.

"Choreographers are busy finding a body double to dance Britney's part for rehearsal," says the source. "And the body double may very well also be the stand-in on the shoot itself if Brit doesn't show on Friday!"

Friday is also a big day for Britney on the custody front, as lawyers for the singer and her ex-hubby are due back in court for another round of legal wrangling in the ongoing custody war over sons Sean Preston, 2, and 1-year-old Jayden James.

Source: WOB