Britney Spears' New Sound

Britney Spears is collaborating with a top R'n'B producer on her new album.

The 'Toxic' singer has been in Las Vegas since Tuesday (30.01.07) working with Lukasz Gottwald, who has previously collaborated with Missy Elliot, Mos Def and Kelis.

A source told People magazine: "Britney is really pulling out the big guns on this album. She's been partying a lot lately but she's been working in studios in Miami and Los Angeles too.

"She's rehearsing material, working hard and having fun all at the same time."

Read More- NeonSter