Troubled singer Amy Winehouse was hospitalized again on Saturday so doctors could run a series of tests on her lungs and chest. Amy had been hospitalized in June for a serious lung condition, so these new tests were a precaution, according to her spokesman. Amy’s father, Mitch, had said his daughter was having lung problems because she was smoking cigarettes and crack cocaine. Her rep insists that Amy is “fine” and “should be back home today.”