Audrina Reaches a Milestone: Turning 23

Brunette straight-to-DVD movie star-to-be Audrina Patridge celebrated her 23rd birthday at the LAX Vegas club with her mother and a group of friends that didn’t include her buddy from The Hills, Lauren Conrad.

When Lauren was asked by Us Weekly why she chose not to attend Audrina’s bash, she said, “Obviously there is tension and other things going on.”

But Lauren’s absence did little to put a damper on Audrina’s party train, and she danced the night away with friends, guzzling Red Bull and Grey Goose. And here’s some photographic evidence that Patridge at least attempted to pretend to ingest some cake.