Ashlee Simpson celebrates her 25th birthday at Wet Republic Ultra pool in Las Vegas

Ashlee Simpson, her husband Pete Wentz, her family including sister Jessica, and her friends partied it up in their VIP poolside cabana. Ashlee and Jessica sipped on Cristal champagne while having a great time. A beautiful birthday cake was presented, while Jessica gave Ashlee a little spanking and Ashlee did the Beyonce ring on it dance. Pictured: Ashlee Simpson and Jessica Simpson Picture by: EBLV / Splash News

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