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Amy Winehouse is back in the hospital after she was spotted drinking heavily following the departure of her dad from St. Lucia (see gallery below).

The Rehab singer's rep tells the Sun that, “Amy fainted after being out in the sun and without drinking water. She has been taking part in a lot of activities which also played a part.”

But locals claim she was so drunk she was "falling out" of a local bar after her dad left the island.

St. Lucia was supposed to be a sanctuary for Amy to get cleaned up after breaking up with Blake, but is she just substituting alcohol for drugs?