Gwen Stefani ... Skin To Win ... No Doubt, Blake's Gonna Love This Outfit

2:10 P.M. PST -- Apparently Gwen did a little pet shopping with her kids too ... stopping to buy her oldest son Kingston a parrot.

Gwen Stefani's got a lot on her mind these days ... and clearly none of those things include staying covered up.

Gwen was spotted out in West Hollywood Saturday on her way to get her nails done with an interesting look considering she's usually pretty polished and put together.

Guess that's what happens when you get a little country in ya.