Gwen Stefani's never been one to shy away from a fashion challenge, and this look is no different. She streamlined the getting-dressed process by doing the adult version of a onesie, picking a denim jumpsuit from Hatch (available to shop here) that she covered up with a long black Smythe tuxedo jacket. For shoes, she picked black ankle boots from AllSaints with a menswear-inspired tassel. It was her other accessories that pushed the envelope more — she opted for blue-lensed sunglasses and a tartan chain-strap bag from Vivienne Westwood. It's a lot of look to pull off together, but Gwen makes for a mighty good inspiration. Shop it all here.