LATEST: Britney Spears and model ISAAC COHEN's short romance fizzled out because of their competing work schedules. The couple began dating in mid-December (06) after they were introduced by Spears' choreographer. Cohen's agent, BRANDI LORD, insists the split was "very amicable" and came about because of their work commitments. She tells American publication People, "They're both busy with their careers. "She just got out of her marriage and she has two kids to take care of. Her plate is full, and the same with him." Still, Lord says there are no hard feelings and predicts the pair may remain friends adding, "They were never getting married. They were having fun together."