Ashlee Simpson celebrated her 25th birthday at MGM's Wet Republic this weekend. Her entourage included sister Jessica Simpson, dad Joe Simpson, mom Tina Simpson, husband Pete Wentz and a few close friends. The Melrose Place star arrived in style wearing a black romper, fedora and of course leopard wedges from her big sister’s self-titled shoe line, whereas Jessica opted to wear a sheer black cover-up and black heels. While on the red carpet, Ashlee dished about the stunning Chanel shoes Pete gave her for her birthday and gushed about how lucky she is to have such a wonderful family, husband and son.

Ashlee and family officially kicked off the celebration inside one of WET REPUBLIC’s bungalows when the gorgeous redhead was presented with a delicious three-tiered cake topped-off with cupcakes. Everyone in the bungalow gathered around the starlet to sing her “Happy Birthday.” During her celebration, Ashlee got on the mic and requested the DJ to play Beyonce’s “Single Ladies” and asked all the bikini-clad females to do their version of the famous dance. She then did her adaptation of the dance for everyone to see as they cheered her on.

The energetic birthday girl enjoyed the atmosphere of WET REPUBLIC and her admirers so much that she even jumped down into a crowd of female fans and danced with them. Sounds like fun!!