Alexa Chung has Pixie'd on the wrong girl

Pixie Geldof swore at Alexa Chung from the catwalk at Vivienne Westwood.

Nice little gurner: Alexa in front row

A fashionista at the London Fashion Week show told us: "Alexa was pulling faces and forming two fingers to try to distract Pixie. The next time Pixie appeared in the show she discreetly posed with her two middle fingers up — but with a big grin on her face."

Well, Pixie, 19, IS the offspring of Bob "Give us your f****ing money" Geldof...