Gwen Stefani, Gavin Rossdale Studio City kingston zuma

No doubt Gwen "Vain" Stefani chose little Kingston's unique get-up yesterday. The outfit looks like something Gwen woulda worn back in her Orange County days (minus the bow tie and if the shirt ripped to expose her midriff).

And it appears Gwen and Gavin even coordinated on their matching white tops and destroyed denim. Hmmm ...

ALL this work -- by the entire family -- just for lunch in Beverly Hills?

Has Gwen's vanity gone overboard?