Christopher Peterson/BuzzFoto/FilmMagic
People Staff
September 19, 2011 10:00 AM

Jessica Simpson and fiancé Eric Johnson celebrated his 32nd birthday with a party at L.A.’s Bru Haus. Among the 40 people in attendance: Ashlee Simpson and boyfriend Vincent Piazza, Jessica Alba and Cash Warren. Guests enjoyed a selection of food, including BBQ pulled pork sliders. Ashlee spent a lot of time on the dancefloor, while Jessica and Johnson focused on being good hosts and talking to all their guests. “Everyone was having a great time,” said an onlooker.

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