Foul-mouthed songbird Susan Boyle not only had a few choice words about a judge on Britain's Got Talent, she also blew up at fans yesterday and lit into a British bobby who subsequently tried to calm her down, reports the Sun. London cops intervened when Boyle screamed at comments by passers-by. When a cop asked: "Is there a problem?" she responded: "Of course there's a fucking problem!" An officer spoke to the tearful singer until she regained her composure.