Kate Middleton Out-of-Control During 30th Birthday Celebration

Kate Middleton may be in need of some royal rehab.

The Duchess of Cambridge, who turned 30 on Tuesday, decided to really let her hair down at a private celebration inside Buckingham Palace yesterday.

OMGG.com has learned that Middleton got a bit unruly, at one point calling a cocktail server “bitch tits” after learning the bar had run out of Patron Silver.

“No one had a problem with the excessive drinking at first,” said Susan Hussey, Baroness of North Bradley. “But things got really uncomfortable when Kate began doing body shots off Prince Harry’s chest.”