Britney Spears has split from new boyfriend ISAAC COHEN, three weeks after the pair began dating. The TOXIC singer and Cohen, both 25, were first seen together powerboating on 2 January (07) off the coast of Marina del Rey, California and recently returned from a lavish weekend in Las Vegas. On Thursday night (18JAN07), Spears was spotted at a Coffee Bean and Tea Leaf cafe in Santa Monica, California where she was followed by a pack of paparazzi. As she headed back to her car, Spears told the photographers gathered, "Me and Isaac are not together, by the way." When photographers asked her if the relationship was really over, she replied, "Yes." The star has also been romantically linked to music producer JR ROTEM since filing for divorce from husband Kevin Federline last year (06).