Kate Moss pulled a diva fit during a recent shoot for Roberto Cavalli.

Moss arrived at the Los Angeles shoot "two hours late," said a spy, and in a grumpy mood.

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"She demanded a beer and then proceeded to finish off beer after beer after beer while she was getting her make-up done. When it was time for the shoot, she sat on the male model's lap but ignored him - didn't say one word to anyone - and then, when her pictures were done, walked out."

A rep for Moss didn't return calls.

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