Ashley Greene was surrounded by friends at a party in Malibu on Sunday. She was just one of many stars who celebrated Memorial Day weekend by the beach including Gwen Stefani, Katie Holmes, and Alessandra Ambrosio. Ashley apparently enjoyed herself at the big BBQ as she tweeted about being so full once she got home. The actress may have indulged over the holiday, but her regular gym routine keeps her fit. She's been sticking to her workouts between business meetings, lunch dates, and nights on the town with new suitors since her split from Joe Jonas.