Gwen Stefani Trick-or-Treating With Zuma Rossdale | Pictures

Gwen Stefani and her youngest son, Zuma Rossdale, hit the streets of London this evening to do a little trick-or-treating. Zuma sported a Star Wars Stormtrooper costume as they set out on the leaf-strewn streets of the city. Gwen decided to forgo dressing up for the holiday, but looked stylish as usual in a pair of sunglasses, a puffy jacket, and her trusty Doc Martens.

The Stefani-Rossdales have made their home base in LA, but also spend time in Gavin's hometown of London each year. Gwen and No Doubt will appear on the UK version of The X Factor this Sunday, and will head to Frankfurt, Germany, for the MTV EMAs the following weekend. After that, she and Gavin will enjoy a couple of weeks of downtime before No Doubt kicks off a series of shows in LA on Nov. 24 and Gavin resumes touring with Bush on Dec. 1.