Sweaters are an easy default at this time of year, especially when most of Us wear jeans. But the right blouse elevates denim in a way that knitwear simply can’t. In my (hour-long) quest for the perfect blouse, I had some surprising luck on Amazon — I’m talking 13 winners that went straight into my cart. The best part? They start at only $1! In order for a blouse to actually upgrade jeans, it has to be polished, flattering and versatile enough to wear with straight, wide or baggy styles. These fall must-haves hit all of the above, and to make things even sweeter, they look mega expensive. Scro...