The `Young` singer - who began dating the `Skins` actor three months ago - broke up when she went to visit him in Bulgaria blaming their hectic work schedules and the fact he will be in eastern Europe until winter because of filming commitments. A source told Daily Mirror newspaper: "Jack is filming the new `300` sequel in eastern Europe and will be there until November. He isn`t able to travel to the UK at all, as filming schedules are so tight. This meant Tulisa was flying backwards and forwards to Bulgaria - as well as fulfilling for her `X Factor` duties. "A long-distance relationship just wasn`t working so the pair sat down together over dinner and talked it through like adults. It was a fairly mutual decision and although she`s really sad to split from Jack, she knows it is for the best." Tulisa began dating Jack following the end of her year-and-a half relationship with N-Dubz bandmate Fazer earlier this year. While with the 21-year-old actor, Tulisa had to deal with an embarrassing sex tape scandal. A clip appeared on the internet which showed her performing an erotic act on her ex-boyfriend Justin Edwards.