Diddy Stuns Partygoers w/ his "Controlling" Treatment of Cameron Diaz

If, as Meryl Streep said in her Golden Globe acceptance speech, Harvey Weinstein is “God,” then his company’s awards-show after-party was a bit of Hollywood heaven.

The Weinstein Co.’s post-awards soiree at bar210 in the Beverly Hilton drew Streep, Madonna, Leo DiCaprio, Tilda Swinton, Viola Davis, Bradley Cooper, Jane Fonda, Sean (Diddy) Combs and Cameron Diaz — although not everyone behaved like an angel.

One partygoer was startled, for instance, by Diddy’s “controlling” treatment of Diaz, with whom he’s recently been linked.

The insider says Diddy and Diaz did not seem to arrive together. Diddy apparently got there solo, says our source, and after being warmly swarmed by Paris, Nicky and Kathy Hilton and posing for photos with them, headed to an elevated back room in a tent pitched in the bar’s parking lot.

There, Diddy found Diaz sitting on a couch “talking to a guy,” says the source.

“Let’s go,” Diddy told the “Bad Teacher” actress, who our source says quickly got up to follow him out a back exit where celebrities could call their cars, away from the prying eyes of the paparazzi.

Before Diaz and Diddy could make their getaway, however, our source says they ran into three male party guests who wanted their pictures taken with Diaz.

She happily obliged, says our source, until an impatient Diddy grabbed her hand, said “Let’s go” again, and pulled her to a waiting car.

“I’ve never seen him so controlling,” says the source, who says Diaz “seemed to like the manly power thing.”

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