Check out these adorable pics of Cameron Diaz — still in Hawaii — with buddy/love interest(?) pro surfer Kelly Slater. It’s good to see her happy again. But this isn’t going to stop Us Magazine from releasing new deets about her Golden Globes war with Justin:

“Cameron was across the room giving them the evil eye,” says a party source. “It was like high school.”

Another witness says that pal Drew Barrymore even attempted to distract Diaz from her ex’s hookup-in-progress with Biel, “grabbing Cameron to dance, trying to make her have fun.”

What Diaz did next, barely five days after announcing an amicable split with Timberlake, her boyfriend of nearly four years, shocked the whole room.

“All of a sudden she just lost it,” says one of the many witnesses to the tantrum of Diaz. “She came up and started yelling at Jessica.”

According to a witness, Biel, 24, stepped away, leaving Diaz, 34, to unleash her fury on Timberlake, 25, who moved with her into a hallway.

Says a guest, “First she started saying all these nasty things to him about Jessica like, ‘What is she? Your new f—king girlfriend? Look at her!’ And then she insinuated things about other guys that Jessica has been with.”

The tirade went on for 45 minutes, until Barrymore finally intervened. Says a source, “Drew had to grab Cameron and say, ‘It’s enough.’”