Oh dear, it looks as though Amy Winehouse is back to her usual tricks again.

The singer, who has found a new love and has stayed off the drugs, couldn't manage to stay on the wagon when it came to alcohol.

The Rehab singer, who was invited to join Mark Ronson on stage at the 100 club in London, hit the bottle before she went on stage to perform.

And according to the Sun, Mark wasn't going to be the next person to buy a round as Amy's antics had angered him.

A source said: “After the gig Mark was furious with Amy for getting smashed and they exchanged words. He was annoyed that Amy got drunk when she knew she was going on stage. It was an important gig for him and he wanted things to be right.

“He felt let down by her - not for the first time.”

By the looks of what Amy was wearing that night, we wouldn't be surprised if she'd got drunk whilst she was getting dressed!

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We thought these days were behind her...