Sean "Diddy" Combs "threw a tantrum" at a Golden Globes after-party this weekend when the bartenders dared to serve a vodka that wasn't his own brand. Page Six says Diddy made a fuss when he couldn't order his Ciroc brand, since the party was sponsored by Grey Goose.

“He made quite a big deal about it, prompting the polite bartenders to finally ignore him and help other guests," a source tells the site.

This is not the first time Diddy has taken offense to a non-Ciroc vodka in his presence. In October, during a party to celebrate T.I.'s return home from prison, Diddy got mad when a guest began drinking a different brand of liquor. He reportedly knocked the glass out of the patron's hand, causing T.I. to lash out verbally at Diddy, who eventually apologized for his actions.

Page Six says Diddy made other news at the Golden Globes after-party. A source claims Diddy “got really cozy” with actress Cameron Diaz, whose past romantic partners have included Justin Timberlake and Jared Leto. Let's hope Diaz is an avid Ciroc drinker!