More trouble for the singer...

Amy Winehouse allegedly punched a fellow patron at the Dublin Castle pub in the London Borough of Camden yesterday.

The troubled singer reportedly spent an hour at Camden's Stapleford Centre, a private clinic providing drug and alcohol addiction treatment. Afterward, she hopped over to the Dublin Castle pub, where she reportedly ordered a shot of Jose Cuervo Especial gold tequila and struck a man in the face.

"She was in front of me at the bar and suddenly turned and walloped me three times across the face. It really stung," Wayne Lindsay told the Daily Mirror. "I couldn't believe it. I hadn't said a word to her or touched her."

Afterward, Amy went to three more bars, the Good Mixer bar, Made in Brasil bar and Zen Sai bar before heading home around 10 p.m.