Amy Winehouse was back in full force at Nelson Mandela’s 90th birthday concert Friday night, but her Glastonbury performance the following day didn’t go quite as swimmingly. When Amy left the stage for the pit during a rendition of “Rehab,” she somehow ended up in a fistfight with a member of the audience. There are several theories as to the impetus behind the attack, including (via The Daily Mail ):

[1.] Crowd members claimed the singer lashed out in response to a derogatory comment about her husband Blake Fielder-Civil, after she spent much of the show making slurring references to ‘my Blakey’.

[2.] Her publicist said she had reacted instinctively when someone tried to pull her trademark beehive hairdo.

[3.] Festival organiser Michael Eavis’s version of events was that the man had made a grab at Miss Winehouse’s breasts.

Or 4) Amy Winehouse is fucking insane. Ding ding ding ding! She actually started off the concert by spitting her gum into the audience, berating their manners when they booed her precious Blake, and later singing “I’m not opening for a cunt like Kanye.”* She’s like the Patches O’Houlihan of live performing. You half expect her to belt out, “Is it ‘necessary’ to punch my fans in the face? Is it necessary for me to drink my own urine? No, but I do it anyway because it’s sterile and I like the taste!” before pelting the audience with a sackful of wrenches.

*Kanye West, presumably — video after the jump.

At Mandela’s birthday:

Glastonbury:

Fast forward to the 2:01 mark for the cuntiness:

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