Get your SURPRISE FACE ready: Amy Winehouse stole cocaine from Kate Moss’s purse.

Ex-hubby Blake Fielder-Civil is $pilling some juicy details to Britain’s The Sun about Amy’s drug habits, including a drug binge at a celebrity party with supermodel Kate Moss, snorting coke on Pamela Anderson’s private jet and coaxing recovering Rolling Stones boozer Ronnie Wood into a relapse.

On partying with Kate Moss at Gramercy Park Hotel in NYC:

“Kate Moss and another supermodel were there, as well as Hollywood actresses. Kate had told Amy to get a 10-dollar note out of her handbag to snort lines with.

“But Amy told me she found two grams of cocaine in there – so she nicked them. We did some in the toilets and had sex, but we did the rest in front of everyone. Kate was so drunk, she never noticed it was missing.”

Blake claimed Amy took her pal’s stash even though “there was plenty of cocaine on a table in the room available to everyone.” He said: “Kate was so drunk she never noticed it was missing.”