Police are investigating claims that singer Amy Winehouse attacked a man on a London street early Wednesday, People.com reports.

Winehouse, 24, was alleged to have headbutted a man outside a bar who tried to hail her a taxi, according to Britain’s The Sun newspaper. The Sun claims Winehouse attacked two men, kissed another, trashed a bar and smoked drugs on a sidewalk.

A call to Winehouse’s London rep was not immediately returned.

The incident is the latest in a long list of events involving Winehouse, who entered rehab in January and won a gaggle of Grammys in February.

Last August she was hospitalized in London for what her rep called “exhaustion,” however, her father Mitch allegedly revealed she in fact had a seizure brought on by drugs.

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