Gwen Stefani: Birthday Shopping Spree with Zuma!

Gwen Stefani wears her hair up in a messy bun while out shopping on Tuesday (August 21) in Los Angeles.

The 42-year-old rocker brought along her adorable son Zuma who was celebrating his 4th birthday dressed as the superhero Robin!

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The twosome filled up their cart with goodies and were even seen exiting the store with what appeared to be two life-size superhero pinatas – one of Batman and the other Spider-Man.

10+ pictures inside of Gwen Stefani and Zuma going on a birthday-themed shopping spree…