Winehouse in Glastonbury scuffle

Amy Winehouse was at it again Saturday night, getting involved in a scuffle at England's annual Glastonbury music festival.

The troubled singer whose drug-addled life has been on view for public consumption in the tabloids was involved in a brief punch-up after taking the stage on Saturday night.

Witnesses say a fan tried to grab Winehouse after she climbed down into the audience pit from the stage and that's when she threw a punch.

The 24-year-old performer sang for an hour in front of a crowd of 80,000,her first full-length concert in seven months.

During her hiatus from music,Winehouse was seen partying at all hours, involved in dust-ups and hospitalized for early emphysema.

On Friday, she made an appearance at the birthday concert in London for Nelson Mandela.

Glastonbury organizer Michael Eavis defended the star calling her show a "triumph" and said Winehouse had asked if she could headline next year's event. Eavis did not confirm whether this would happen in 2009.

BBC News says footage of the incident did not clearly show what provoked Winehouse.

The Grammy-winning singer gave a strong performance for most of the set despite fears she might not be up to it.