Gwen Stefani and Gavin Rossdale had a busy holiday weekend with their boys, Kingston and Zuma. The foursome were spotted out in LA on Saturday enjoying frozen yogurt and shopping, and they also made a stop at the Warren-Tricomi salon. Kingston was apparently treated to a festive new 'do since he emerged sporting a partially shaved head and a bright blue mohawk. Monday's activities were just as patriotic when Zuma wore a Captain America costume during a grocery store run with his nanny. Gwen and Gavin were back with Kingston and Zuma later in the day as they headed to Gwen's parents' house for a Fourth of July BBQ. The Stefani-Rossdales were just one of many stars who celebrated Independence Day around town, and the Garner-Afflecks also got into the holiday spirit during a parade in their neighborhood.