Audrina Patridge turns 25 today and she got her celebration started a day early in Las Vegas! She hit the Liquid Pool at Aria with her boyfriend Ryan Cabrera and brother Mark Patridge for an afternoon of bikini photo ops, water guns and cake. Audrina joked on her Twitter that she's not quite where she thought she would be at this age when she was a kid, but it looks like she was having a blast anyway. Check out all sorts of pictures of her birthday fun!
Audrina Patridge Brings Her Birthday Bikini to Vegas!
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