Kirsten DunstKirsten DunstKAPOW.

Perhaps that's the noise the biff made when it was landed on Kirsten Dunst?

We can but guess, as we weren't there.

But the culprit is happy to fill in the rest.

Yet who was the meanie who landed one on Kirsten?

Well, it was none other than the ladylike Amy Adams.

And according to her Kirsten was cruising for a bruising.

Amy said: "She was being snarky.

"She had a wicked sense of humour, and she had offended the Minnesota folk one too many times for my liking, so I punched her.

"It wasn't a true punch, though, because I could've disabled her."

Thank goodness for that.