Stefani's Kid Already Gone Metro

Gwen Stefani's son, Kingston James, is only 18 months old, but he's already quite the fashionisto.

TMZ caught the adorable Kingston doing his own shopping yesterday in NYC, perusing the low hanging shelves at Trico Field, a Japanese clothing company clearly approved of by his Harajuku-lovin' mama.

Gwen was there to lend a helping hand in styling her fashion forward son ... oh, and to pay.