Scottish singer Kt Tunstall is one step closer to single life after her divorce was approved by a judge on Thursday (23May13). The Suddenly I See hitmaker married Luke Bullen on Scotland's Isle of Skye in 2008, but the couple separated late last year (12) and the drummer filed for divorce citing the star's "unreasonable behaviour". The case went to court in London on Thursday and Judge Susannah Walker signed off on a decree nisi, declaring the marriage had "broken down irretrievably". During the brief hearing at London's High Court, the judge ordered Tunstall to cover the legal costs stemming from Bullen's divorce application. The singer must now wait for the issue of a decree absolute, which will be granted in around six weeks' time to formally dissolve the union.