Most of Audrina Turns 23 in Las Vegas

5/18/2008 3:10 PM PDT

Most of Audrina Turns 23 in Las Vegas

The only two reasons to watch "The Hills" celebrated her 23rd birthday at LAX Nightclub in Las Vegas night.

Audrina Patridge's birthday was actually on the 9th -- but who cares, really? Btw, no sign of Lauren at the shindig -- fake show frenemies are the worst kind!