After her interesting performance at Glastonbury where she smacked a fan while singing Rehab, Amy Winehouse checked back into the clinic where she had been receiving treatment the past two weeks.

Then last night she checked back out.

To celebrate, she hit the streets of London for a night of partying and (most likely) getting geeked out of her head. The junkie soul singer was out until 4:30am.

A source told The Sun, “We feared a taste of the outside would remind her what she’s missing and it would be hard to get her back into life at the clinic. That’s exactly what’s happened. Sunday was like she was on a terrible comedown from the whole thing.”

Amy’s spokesperson said that Amy is currently receiving outpatient care.

Stumble it!