Wino -- Back to Black Lung, Again

She's not in a pub or wreaking havoc on the streets, so where is Amy Winehouse? In a hospital, of course.

So says her rep, who says Wineheezy is in the hospital after being admitted for a possible chest infection. She was hospitalized for a severe lung problem back in June -- some reports said emphysema -- and doctors wanted to make sure it hadn't returned.

She should be released today. As for reports she's in rehab, her beleaguered rep says not true.