Gwen Stefani brought her boys, Kingston and Zuma, to a friend's birthday party in LA on Saturday afternoon. She carried a bright pink gift bag and showed skin in a striped maxi dress. It was the second weekend bash in a row for the trio, who recently attended a fete where Kingston had his face painted. Dad Gavin Rossdale didn't join them since he's been busy traveling with Bush. Their most recent tour stops took them to the East Coast, with their latest concert taking place in Washington DC today. Gwen's focusing on her own music career closer to home and has been in the studio with No Doubt for the last few months.