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!
Most of Audrina Turns 23 in Las Vegas
5/18/2008 3:10 PM PDT BY TMZ STAFF
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