And in this corner, we have Amy Winehouse.

The beleaguered pop star reportedly gave a fan a one-two punch in the face at Saturday’s Glastonbury Festival in Somerset, England.

At the conclusion of her hour-long set, Amy climbed down in the pit of 80,000 revelers and struck a fan in the face.

But the attack wasn’t unprovoked, according to the 24-year-old’s rep.

"The ‘lashing out’ was when someone tried to grab her hair and she reacted," Amy’s spokesperson said.

The altercation notwithstanding, Amy, who, according to her father, has developed emphysema, appeared to have been in fine form during her performance. There were no cuts and scars or running off the stage this time around as she crooned her hits “Rehab” and “You Know I’m Know Good.”

And of course, what’s an Amy Winehouse performance without a shout-out to Blake Fielder-Civil a.k.a. Blake Incarcerated?

"I wrote this one for Blake," she said of "Wake Up Alone."

"I thought I’d never see him again. I’ve only got two weeks left of this predicament, so this one’s for you, Blake."

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