Audrina Patridge Celebrates Birthday Without Lauren Conrad

Times have certainly changed with The Hills gang!

Cutie Audrina Patridgecelebrated her birthday in Las Vegas Saturday night without the annoying Lauren Conrad.

The now 23-year-old (her actual birthday was May 9) drank Grey Goose and Red Bull and goofed off with pals — including her mom! — at club LAX.

Wearing a black spaghetti strap dress, Patridge danced to Akon’s “Smack That” while a female pal slapped her booty.

At 12:40 a.m., a white-frosted cake decorated with roses was brought out. Patridge — who flew in from Hawaii, where she’s filming her first movie Into the Blue — grabbed a rose and licked frosting off the stem.

An hour later, Patridge flirted with a guy friend by giving him a peck on the lips, and later stole his fedora hat off his head.

So why didn’t Conrad, 22, party with her pal in Vegas?

“Obviously there is tension and other things going on,” Conrad said at the Hills season finale party in Beverly Hills last week.

“I mean there are things in our relationship, but that’s how every relationship is,” Conrad added. “You fight, you make up, you get along…obviously we are going to have problems, but we are still friends and we love each other.”

Riiight!

Team Audrina!

Lauren was probably at home obsessing over some guy who really isn’t into her, while “Lo” Bosworth wipes her tears.  Audrina would be a thousand times more fun to hang out with!