Britney Spears is getting back to business in the recording studio, after spending a wild weekend in Las Vegas with her new beau ISSAC COHEN. The TOXIC star was working on songs for her new album at Record Plant recording studios in Hollywood on Wednesday (17JAN07). The 25-year-old was photographed taking a half-hour break with pals at West Hollywood gay hangout Hamburger Mary's at 10:30 pm. A source tells American publication People, "She was rehearsing material, working hard and having fun all at the same time." Spears' manager, LARRY RUDOLPH, claims the singer is approximately half-way through recording her new disc adding, "She's real excited."